The backroom cliquish nature of the TNG cast actually emerges out on screen in this film.
I'd blame that on Rick Berman, Ron Moore, and Brannon Braga more than I'd blame it on anyone in the TNG cast. But at least Moore & Braga were cool enough to admit the film's flaws on the commentary.
I don't blame the TNG cast for Generation's problems. I just think it is funny how the insular nature of the TNG ensemble comes out in this film, elbowing Kirk right out of the way.
They can get this right. They got it right in
Unification and
Relics. That very elegantly weaved the different generations together keeping Spock and Scott in the spotlight delivering for us some world class episodes in the process.
But I just think they got carried away in the rush of finally making a motion picture so much so that even Spot the blasted Cat's problems threatened to overshadow the after-consequences of Captain Kirk's reappearance from 'death' and his subsequent death!