The problem with the 1st point is that we won't have different types of Inf or Cav, within the same army (alas). All examples I have seen, show that every Inf Rgt in play, is of the same type; dto for Cav.
Given that, it's kind of pointless to look at certain unit types being harder to replace than others.
On the general question, of course it would be better if we could borrow/lend or buy/sell units. And it would be better if coalition armies could operate under common command. Those points are self-evident. However, assuming it can be patched into EUIII, what helps are you going to give the AI, to allow it to keep up. It seems the AI is improved over EUIII. It may be more moddable. But it's one thing for an AI to be better at handling a combat system developed from EUII, it's quite another for it to handle a whole new system. (I do hope the AI is more moddable, in which case I can't wait for IDLF's version -- assuming I can ever afford a PC to play it on).
Given that, it's kind of pointless to look at certain unit types being harder to replace than others.
On the general question, of course it would be better if we could borrow/lend or buy/sell units. And it would be better if coalition armies could operate under common command. Those points are self-evident. However, assuming it can be patched into EUIII, what helps are you going to give the AI, to allow it to keep up. It seems the AI is improved over EUIII. It may be more moddable. But it's one thing for an AI to be better at handling a combat system developed from EUII, it's quite another for it to handle a whole new system. (I do hope the AI is more moddable, in which case I can't wait for IDLF's version -- assuming I can ever afford a PC to play it on).