@real_tabasco_sauce I'd like to remind you something you said in the illuminating thread I referenced:
I agree with that, that's why I'm even against increasing training times and "every phase up would reduce training times" mentioned there, that would make the start of the game too slow for competitive players. I proposed instead (apparently ironically amazingly) increasing training times but making batching more efficient to keep the current training times for more average sized batches (again, all balance-pending, since this might make comebacks too strong, larger batches being produced even faster than currently). Lower difficulty AIs should not batch. I also find interesting the idea mentioned there that Mercenaries "should be able to be recruited very quickly", which could apply to their batch efficiency, giving them an accurate and clear use case.