Don't misconstrue 'junk' to mean 'crap'. What I meant is it's a lot of things that got made during the development of JK that didn't get used, of mixed quality. Many of them were probably never meant to go into JK at all. They might represent test levels, or level designers going off and doing their own thing. If you've read the press that came out before JK was released; a lot was cut from JK. Mostly from the multiplayer.
Jedi Academy appears to be the same sort of lazy game design. Random disconnected ideas, with a game thrown around them.