I just finished the game yesterday, and I'd like to echo what people have said here already. At first I wasn't too disappointed about the ending... it was very abrupt, but I was reaching the point where I thought the game needed to end. However, upon seeing what was planned for the ending, I cannot express anything except utter dismay that OE seemingly was forced to rush the product out the door, and that no effort was made to change this for the PC version, even without an X-mas deadline.
Honestly, I would have rather had the extra 30 min - 1 hr required to wrap the game up smoothly and satisfyingly, as opposed to, say, an entire planet like Korriban (which was my favorite planet in KOTOR, and needless to say, a big disappointment in this game).