Trek had to change to survive.
But that is part of the problem. Trek - and TNG in particular - was not allowed to change or take risks, because it was a hit. Plain and simple. It was a Paramount cash-cow. The powers-that-be made sure it rode enough of a safe line.
Generations and Insurrection were fraught with studio influence and meddling. Nemesis was a pile of garbage helmed by a really bad director and equally bad screenwriter. First Contact is the only one of the four films that ended up being solid enough to enjoy and appreciate as a decent film. But that is at least partly due to the fact that the "baddie" was the Borg - a good choice but also a fairly safe choice for all involved in the films to choose.