Though this is going to sound strange, I hope you don't take the piss to much.
Here goes, I hope they don't make it to addictive(see?

). I mean I got through KOTOR1 in what was basically about two days of non-stop gaming. I just couldn't force myself to leave the game, which meant that in a weekend I'd finished the game. You could (and do) point to the fact that the game is to short, but then again I completed BG2 SOA in about the same time or maybe it's just a lack of willpower on my part

.
My suggestion to this is to put some boring parts into the game and why not? BG2 has lots of them, I mean it took me about a month to complete BG2 though in hours it was more or less the same as KOTOR. In fact the only time I really couldn't put down BG2 was in the later parts of the game:fighting Bohdi, the Elven city and of course Jon himself. This is not to say I didn't like BG2 I loved the game but there was parts in which I thought to myself- I have to go all the way back there to do that then all the way back to do this, so I'd save and do it again another day.
Perhaps therein lies the answer: bigger playing areas where not much happens for awhile but KOTOR1 already has four discs so if bigger playing areas are brought in along with more dialog options, better enemy AI,bigger side quests, more party interaction etc. How many discs would that be? And then there's the specifications, how many free gigabytes of hard drive is that going to use, what sort of ram will I be looking at?
I'm sorry if any of this doesn't make sense and about me jumping around like a frog on hot tarmac. But hopefully somebody understands what I'm trying to get at(though I won't hold my breath

).