As much as I actually like the saucer crash sequence and think it still holds up today over twenty years later and really shows the quality of work you can get out of models, I do think it was a mistake to destroy the Enterprise D. When people think of TNG, they think of the Enterprise D, and IMO, it could have helped the other movies to see the crew on a familiar ship, as opposed to what we got where they are on a ship that the audience never really gets to develop an affinity for other than its "kewl look."
I realize the decision was made for merchandising reasons, as a new Enterprise means new toys and model kits. But I still think it was a mistake.