What you've said is true, but Bioware polished the PC KotOR up quite a bit, even adding in an entire map, new items, etc.
are you talking about the Yavin Station? That shouldn't really count as an extra map. (Bioware just added it in as a place to buy lightsabre crystals, I think.
I had a different take. I thought the writing was abysmal... and not only technically. It was just terrible to read. Still, the ideas behind the writing were on the spot. I think I would have loved it if MCA would have cleaned it up a tad. Of course, we don't know who actually did the writing.
I wouldn't call the writing "abysmal," but it could have used quite a bit more editing. The spelling/grammer mistakes were what really put me over the edge, though. Bastilla?
The majority of the game's writing does feel rushed and half-finished, though; ideas that would have been well-executed had Obsidian gotten more time. It felt like Planescape Lite.