I think it is implicit in my post,. You aren't defending anything with having 1 heavy ship. It's a completely useless strategy. My example was for when you have a low force limit. If you have a force limit of say 6 in the mediterranean even 6 heavies are almost entirely useless so why would you have them? They don't generate income, in fact the reverse is true. So if 6 are useless then any fewer are also useless and therefore a complete waste of money. The only sensible thing is to have 6 light ships and the only way to have some degree of protection from stack wipe is to split them up. I cant see why this is so hard for some people to understand.
Because as was stated elsewhere in this thread, a stack wipe of 6 ships is pointless and barely a setback. You're going to have a lot of trouble convincing people if you're complaining about losing 120 ducats. Not to mention that losing 6 light ships isn't going to make a significant impact in your income in any case. With that tiny a naval force limit chances are you're a small nation or OPM that
isn't focused on trade and are only generating a few ducats per month of trade income anyway. If you do have good trade power with that tiny FL it's probably more from provinces than anything else anyway. You're probably better off at that size making galleys or transports anyway, because naval trade is simply not going to impact your nation that much if you can't even field a sizable fleet.
That's what people are having such trouble understanding with your argument: why you're using an extreme example to argue for the option to have the ability to do tedious micromanagement for a most likely negligible benefit. Like, I seriously doubt if the trade income generated by 6 light ships would come close to paying off the 120 ducats to build the things over a decade, even not counting maintenance.
And your argument obviously falls apart when dealing with large trade fleets, which is what most people are going to care about because that's actually a problem if they get wiped. Not only is a large trade fleet better equipped to run away with fewer losses than smaller ones that are going to get wiped completely, but when you're fielding a couple hundred light ships and actually generating substantial trade it becomes far more economically viable to lump in 20-30 heavy ships and/or some incredibly cheap galleys in the fleet.
Am I against the ability to give the players options on whether or not they want to auto-merge? Obviously not, or at least not the principle of it. But an option to do auto-merge requires some space on the interface, and AoW already has made the fleet interface incredibly cluttered. Unless you can come up with a better reason as to why not merging fleets is a worthwhile and safer option to still include for examples where a trade fleet would actually be a significant loss/worthwhile investment, I just really don't think a button to toggle merging is worth the screen real estate.