Shorter path to lightsaber (I'm a Jedi (or a Sith, anyway), give me my lightsaber now, not on the third planet...). I want to find out what actually happened to Revan, I was greatly disappointed by K2 in that respect. I don't really care that much about the Exile. It'd be nice to know where that story went, but Revan is much higher up on the to-do list. The ending of K2 was weaksauce. Definitely need real, and different, endings. I liked the endings of K1 much better.
I'd like to see a REAL dark side story. Not just random, unnecessary unjustified cruelty. I'd like to start as a youngling or whatever the Sith equivalent is and have the option to "fall" or be "redeemed" during the story progression at any time via Dantooine/Korriban.
Honestly, I wasn't all that fond of the major plot twist in K1. The robes/mask only go so far so explain no one recognizing you, SOMEONE had to know what you looked/sounded like lol