I do think that Logan had some good ideas in his script. The debate of what makes us who we are is a good one. Having a clone that is like you in many ways but different in others, is a good way to have this debate. And the attack on the senate scene in the opening of the movie was a great WTF moment. But I would agree that it felt like a first draft. It had a lot of problems from continuity errors to plot holes. And, the whole concept of introducing a human clone to Picard out of the blue and having this clone somehow take over the Romulan Empire is problematic. I would have replaced both Shinzon and B-4 with Lore. Having Lore lead a band of disenfranchised Remans would make sense because it would be reminiscent of what Lore tried to do with the Borg survivors in the ep Descent. And yes, Baird sucked as a director. He had no clue how to direct a Star Trek movie. A lot of the TNG actors even admitted in interviews that Baird did not even know their character names. He clearly did not know anything about TNG. He directly the movie like a generic scifi action movie and it shows. He cut out all the good character moments. The movie lacked the soul of a Trek movie and seems to just skip from one action scene to the next. With a tighter script and a better director, Nemesis could have been a good Trek movie.
This is an interesting point. I actually think there is a LOT of good character stuff in Nemesis...but that even more got cut out, and that was a huge shame. You could have trimmed a bunch of foolishness out and kept in a number of the scenes that were cut (the deleted scenes on the BR/DVD are almost all better than stuff they kept in) and had a much-improved movie.