Imo if there are more slots to fill in a divisions, there need to be more combined_arms unit types. Which encourage the player to make diverse units. Infantry_unit_type, artillery_unit_type, armor_unit_type, support_unit_type and direct_fire_unit_type are imo than not enough.
Yes, I agree. with the current level of complexity (in which I listed the current number of CA types) there just aren't enough different things for each of those 70 different units to do. Adding more CA types is increasing combat complexity - I have no argument with saying that increasing complexity could increase the number of useful units.
The rules of rock-paper-scissors are very simple, and therefore optimal play is relatively simple (choose randomly between the 3 available options). What you are saying here is that if we make the game more complicated (rock-paper-scissors-lizard-spock), then the optimal solution increases in complexity (choose randomly between the 5 available options)
I disagree, unless you start expanding the combined arms types drastically.The challenge is to give all those units a use ingame and make it differently stat wise. I believe that with the current HoI3 brigade stats that it is possible.
With the current TFH mechanics, this is the way that I see things:
I didn't put in a role for SHARM, RART, SPRART. Even the AA units probably are worthless, just using the IC to buy planes instead is probably more optimized
You can see that it's pretty crowded already, so a massive expansion of unit types is going to be hard to accommodate. Ignoring paradrops for one second, I think the only things that are missing are potentially some fast amphib units (maybe amphib armor or something?), a fast mountain/arctic unit (too specialized or not realistic though?), and possibly something resembling cheap non-motorized engineers?
There are some choices to be made within each box, but generally speaking this is either early/late game (as in Mot vs. Mec), or dependent on whether your nation is better suited to IC or manpower costs (Inf vs Mil)
On paradrops, I made a note of units I would say are too specialized, (paradropping into mountains for example - how often does this happen?). This leaves a few more open spaces, that I agree could be filled in with some more variety if people were desperate to do so. The trouble is that you don't want to make paradrops even better than they are by allowing the dropping of a full combined arms division.
You could probably make more use of some of the other terrain types, but for the most part these are too specialized to be of use. I'm not sure that Mountain is even really worthwhile so jungle/plains/desert/marsh troops probably are too specialized