Why was the Hard Cap introduced and what is the problem with it?
First we need to clarify why the devs introduced a hard cap.
The fundamental problem behind this decision was, that it was reasonably possible to
use special forces as "line infantry", whereas we (the community) want them to
be "special" in a form, that we can't afford lot of them.
Some people also argue with the fact, that it isn't historical to have lots of special forces.
Obviously the hard cap solved this problem.
So why do I say, that we shouldn't be happy?
It's because in my opinion the hard cap didn't solved the underlying real problem,
and instead only solved annother problem, that was caused by the first.
The real reason why people were building special forces en masse
was that they are stronger than regular Infantery in combat and that there were no real drawbacks in doing so.
Even the slightly higher industry costs didn't seem to be a reason not to deploy them instead of regular infantry.
(Marines for example need 150 Infantery equipment instead of 100 per Battalion)
Now we should take a look at real armies in WW2.
Did they have something like a hard cap that prevented them
from replacing regular infantery with special forces?
No, and still they didn't, cause it would have been a worse strategy.
I don't know the details, but I would assume that it was very costly to train and to maintain
special forces and that they were really great at their special tasks,
but it was not cost effective to use them in regular combat.
What does this mean in game terms?
I would suggest 2 things:
1. Make special forces more expensive
Why don't they cost Support Equipment? They use things like Parachutes, Skis and so on.
(1 Support Equipment is as expensive as 10 Tier 1 Infantery Equipment)
For example they could need 10 support equipment per battalion which would mean:
For example a Marine Battalion would cost:
150 Infantery Equipment (Tier 1) = 60 Industry Costs
10 Support Equipment = 40 Industry Costs
An Infantry Battalion now costs:
100 Infantery Equipment (Tier 1) = 40 Industry Costs
So the Marine Battalion would be 2.5 times more expensive (smaller factor for other tiers of Inf. Equipment)
compared to the Inf. Battalion and the upkeep also would be more expensive,
because more equipment is destroyed by battle and by attrition
when you simply are using more.
2. Don't make them more powerful in combat than Infantry(nerf Marines and Mountainers)
and give them instead "special abilities"
I think it's okay when they are slightly stronger than regular infantry,
but it leads to strange results if they are to powerful.
Instead they should have "special abilities" which would justify the higher price.
For example:
Parachute Infantery is the only unit in the game that can be dropped by planes.
This is an ability which allows new strategies, when you are able to afford the costs for them and their transport
planes. Ironically they were the only special force which wasn't build in high numbers, Parachutes aren't
stronger in combat.
I would like to see similar "special abilities" for the other two special forces:
Maybe Marines would be able to do see invasions without planning time.
(That would largely increase the flexibility of your army)
And Mountainers could get a 100% or 200% Movement-Buff in Mountains or something.
(I'm not happy with this one, but I do not have a better idea now, maybe you do)
Conclusion
In my opinion a Hard Cap wouldn't be needed if the devs would follow this approach to solve
the explained problem, because no one would longer substitute regular Inf. with Marines or Mountainers,
because it wouldn't be a good strategy in general.
Anyway it would allow you to increase the size of your special forces contingent,
even if you are a minor country (like Switzerland or Iran, where they have a lot of Mountains).
First we need to clarify why the devs introduced a hard cap.
The fundamental problem behind this decision was, that it was reasonably possible to
use special forces as "line infantry", whereas we (the community) want them to
be "special" in a form, that we can't afford lot of them.
Some people also argue with the fact, that it isn't historical to have lots of special forces.
Obviously the hard cap solved this problem.
So why do I say, that we shouldn't be happy?
It's because in my opinion the hard cap didn't solved the underlying real problem,
and instead only solved annother problem, that was caused by the first.
The real reason why people were building special forces en masse
was that they are stronger than regular Infantery in combat and that there were no real drawbacks in doing so.
Even the slightly higher industry costs didn't seem to be a reason not to deploy them instead of regular infantry.
(Marines for example need 150 Infantery equipment instead of 100 per Battalion)
Now we should take a look at real armies in WW2.
Did they have something like a hard cap that prevented them
from replacing regular infantery with special forces?
No, and still they didn't, cause it would have been a worse strategy.
I don't know the details, but I would assume that it was very costly to train and to maintain
special forces and that they were really great at their special tasks,
but it was not cost effective to use them in regular combat.
What does this mean in game terms?
I would suggest 2 things:
1. Make special forces more expensive
Why don't they cost Support Equipment? They use things like Parachutes, Skis and so on.
(1 Support Equipment is as expensive as 10 Tier 1 Infantery Equipment)
For example they could need 10 support equipment per battalion which would mean:
For example a Marine Battalion would cost:
150 Infantery Equipment (Tier 1) = 60 Industry Costs
10 Support Equipment = 40 Industry Costs
An Infantry Battalion now costs:
100 Infantery Equipment (Tier 1) = 40 Industry Costs
So the Marine Battalion would be 2.5 times more expensive (smaller factor for other tiers of Inf. Equipment)
compared to the Inf. Battalion and the upkeep also would be more expensive,
because more equipment is destroyed by battle and by attrition
when you simply are using more.
2. Don't make them more powerful in combat than Infantry(nerf Marines and Mountainers)
and give them instead "special abilities"
I think it's okay when they are slightly stronger than regular infantry,
but it leads to strange results if they are to powerful.
Instead they should have "special abilities" which would justify the higher price.
For example:
Parachute Infantery is the only unit in the game that can be dropped by planes.
This is an ability which allows new strategies, when you are able to afford the costs for them and their transport
planes. Ironically they were the only special force which wasn't build in high numbers, Parachutes aren't
stronger in combat.
I would like to see similar "special abilities" for the other two special forces:
Maybe Marines would be able to do see invasions without planning time.
(That would largely increase the flexibility of your army)
And Mountainers could get a 100% or 200% Movement-Buff in Mountains or something.
(I'm not happy with this one, but I do not have a better idea now, maybe you do)
Conclusion
In my opinion a Hard Cap wouldn't be needed if the devs would follow this approach to solve
the explained problem, because no one would longer substitute regular Inf. with Marines or Mountainers,
because it wouldn't be a good strategy in general.
Anyway it would allow you to increase the size of your special forces contingent,
even if you are a minor country (like Switzerland or Iran, where they have a lot of Mountains).