If they hadn't blown her up in Generations, the Enterprise-D would've trashed the Scimitar in Nemesis.

Because by then she would've had that bitchin phaser cannon.

First Contact would've been pretty similar, just add some scenes of Picard mercilessly executing assimilated kindergarteners.

Insurrection would've been exactly the same. I honestly think they forgot about blowing up the -D when they wrote that script, and only remembered when they couldn't find the sets.