What went wrong: Nothing, though Baird's offhanded and repeated dismissal of pre-established Star Trek canon—characters, design, relationships, backstory, previous Trek films—strongly implies a fatal contempt for the series. He brightens noticeably when describing the parts of the film he got to design from scratch, or redesign to override previous series installments.
Comments on the cast: Virtually none. Baird devotes a bare word or two of praise to actors Patrick Stewart and Brent Spiner, but mostly seems to regard them as props amid his more interesting sets and computerized cameras. Judging from an awkward reference to "Patrick and Brent and... Worf," he doesn't even necessarily remember their names.
Inevitable dash of pretension: Baird's entire commentary is self-important and affected; his gravelly murmurs make him sound like a beat-poet wannabe at his first open-mic. Suddenly the film's ludicrously weighty tone makes more sense.
I wish someone could explain why the final film in the TNG canon was given over to a man who had such obvious contempt for the legacy and mythos of Star Trek. What a waste.