I think one of the issues here is the definition of "cut scene". It sounds like it's being used here to mean what we called FMVs back in the PSX's day. That is, scenes that were specially rendered to really show something off (like the Highwind, as someone mentioned above).
But that's not what they're being used for or even what they are, here. I don't even know if I've seen a single scene rendered outside of the normal game graphics except for the very beginning (and I think when Sora wakes up) and, I assume, the ending. The rest of the so-called cut scenes are just dialogue sections. Would you berate Final Fantasy 6 or Chrono Trigger for every time you have more than say 3 windows of dialogue in a row during which you can't move? Those are the exact same thing, after all.
Or how about this, take a book, and every time you have a page that's at least 50% dialogue, skip the whole page. See how much of the plot you understand. If you don't understand the plot after doing that does it mean the book was poorly written? Does it mean the plot was "poorly integrated" as someone mentioned? No, it means you're a retard who skipped most of the plot. Same exact thing as skipping the "cut scenes" in KH2.
Another point I find farsical is the idea that everything should be completely active like Halo. I'm sorry, but I find it difficult to envision Sora and company always running around fighting stuff or doing things, even when they're being told something important like what Yen Sid (lame joke, BTW) tells them. If you don't have the patience to pay attention to the story and dialogue without the urge to run and jump and whatever, then why on earth are you playing an RPG in the first place? Go play a mindless fighter like Dynasty Warriors.
I personally didn't find the voice acting that bad for the most part, but there were definitely really bad parts. ex: Aerith's new voice actress should be shot. The lines where Cloud tells you about Sephiroth for the first time are certainly among the worst written I've ever seen, I'll grant, but it's not ALL that bad.