Then they should have made KOTOR and TSL a FPS and not and RPG.
Ironically, many old RPGs don't in fact have choices. In fact, I'd venture to say MOST RPGs don't have choices (Paper Mario series, Earthbound, Fire Emblem, FFs). And what about the Rouge-likes? No great storyline there but people love them anyway. Could it be that some RPGs are not about roleplaying, but about roll-playing
Only recently has this 'choice' fad came into the forefront, with CYAs becoming more popular. Meanwhile, FPSes like Deus Ex, Jedi Knight, FU, and "The Suffering: Ties That Bind" are starting to introduce choice into the gerne as well...
I can only remember two games however that not only offer choices, but allow them to be 'permenant' (in that your choices effect what happens in the next): TSL and "The Suffering: Ties that Binds". Games that usually have choices deal with them by fusing all the endings together or just declaring one event canon, and followed the events from them.
TSL provided us that choice. So, we expect to get that same choice in K3...