I wouldn't really call Nomura the Lucas of JRPGs, but then again, I'm not that huge into Star Wars but I am still relatively excited for the next film. Though, I do remember Jar-Jar vividly, and that's as someone who saw the Phantom Menace as a child and still found him... very eh. I wouldn't say KH ever reached that level.
I would actually argue the games Nomura scripted himself were my favorite, character-wise (excluding the obvious KH1 and CoM). Days, while having an eh story and eh gameplay and overall kind of eh feeling, had some golden character moments, and I still, to this day, would argue RAX is the best developed original trio (excluding SDG). Plus, Nomura's skills at dialogue and one-liners kind of really shows in Days. DDD also had some of my favorite character scenes, especially the Riku ones, but lacked a lot of the quirky dialogue Days had. Plus, Nomura never really screwed over the story as much as people give him credit for.