Um, that's not what I read at all. What I read was that TNG's FX was all rendered with computers at the time, at NTSC resolution, so it was all useless when they did the remastering, and they had to make all-new FX shots. The place where the film was invaluable was for all the live-action stuff (i.e., anything with actors and sets, or on-location). It's much like what they did with ST:TOS, except TOS actually did film real models, but they were so awful by today's standards they redid them with modern CGI.