I've thought for a while that Berman, when he was handed the reins to the film franchise, should have made one more TOS film, with whichever actors he needed/could get (ie., probably not Kelley, because his health and frailty made him uninsurable), in 1994, followed by a crossover film in 1996, and TNG solo film in 1998-9. But, that's also a level of long-term planning that Hollywood didn't do at the time.
I wish the Star Trek films adopted more of a "let's use the characters we need" attitude. Like, Nemesis is Romulan-heavy; why isn't Nimoy reprising Spock in that film?