Here's part of an offf-the cuff review I did of The Director's Edition off of another website:
The idea of redoing aspects of a movie because the
technology has finally caught up with ones vision makes me cringe, post-Star Wars special editions, but this one's a bit different, primarily because the director in question is Robert Wise, who was the editor of Citizen Kane, and because TMP was adhering to a very strict release date, and the movie was not finished when it was released.
This new cut is not a just a bunch of new special effects tacked on, it is a new cut. Wise cuts dialogue out and re-edits certain scenes to make a lot of it flow more freely. And the added special effects do not seem to be out of place at all. Particularilly welcome is the new Vulcan background, which is more akin to previous and later incarnations of the planet. Also included are an actual establishing shot of V-Ger, and a cleaned up wormhole sequence. Everything added and cut, makes for a better movie.
Unfortunately, there is only so much one can do with this movie. Wise was setting out to make his 2001: A Space Odyssey, and the recut makes that even more clear. And while in some places visually stunning, he did not succeed in his goal. The pacing is soooooooo slooooooowly. I kept thinking, wow this movie must be about half over then, and in reality only 20 minutes had gone by. The famous drawn out shot of the Enterprise goes on way too long. The commentary explains that Gene Roddenberry wanted to show a ship that looks real and looks huge and with that, it succeeds, but the scene just keeps going on and on and sets a standard for the rest of the movie for a whole bunch of scenes that are essentially, people looking at special effects. The acting is very wooden, (Shatner gives his worst performance here, mostly because he is given very little to do. (According to the commentary, the wormhole sequence took 3 weeks to shoot. After that, I'd probably
phone it in, too)
The Decker/Ilia romantic sublot is wasted. Later, Gene would rehash it (and waste it again, for the most part) with Riker/Troi in TNG.