Carlos has a bit more range/"complexity" in the original game -- he plays it overly suave and overconfident, but it becomes clear that he's overcompensating, has some sort of implied TRAGIC BACKSTORY, and his relationship to the USBC is a bit more nuanced.
I'm not going to argue that any resident evil character is well-written or truly complex in any compelling way, but the matrix of relationships in the remake does simplify and reduce. >>7849867
That Mikhail would know who Jill is isn't in question -- of course he could, within reason, be privy to such information. But why on earth would Mikhail be privy to such information concerning Umbrella's clandestine activities if he is supposedly the morally good leader of this rescue mission, when the player is well-aware that the rescue mission is merely a front? That would indicate that either Mikhail is as duplicitous as Nikolai, or that, more likely, he, like most all other USBC members, is being kept in the dark. If memory serves, the USBC members are essentially a rag-tag assemblage of washed up military, former third-world guerilla, etc. -- they don't have that much depth in terms of institutional history. Mikhail is certainly not aware of Umbrella's use of Nemesis to eliminate STARS or Mr. X to eliminate other critical witnesses, for instance.
Really, this is a symptom of the writers' need to build up Jill as hero, and to make more central the antagonism between her and Nemesis -- which also explains why the game feels the need to open with Nemesis being loaded for delivery and then bursting through Jill's apartment wall. RE3remake has to contend with and respond to the mythology of the Jill-Nemesis relationship that has developed as a function of the original game's reception, which necessitates a reorganization of its narratological and thematic elements -- it's the same discursive phenomenon that requires Sephiroth to appear the first half-hour of the FFVII remake, if that analogy makes sense.