Assist to turnover ratio would be my biggest concern. Murdock has 100 assists to only 37 TO's while Jimmer has 40 assists to 29 TO's. Fredette is a better scorer but he doesn't take care of the ball as well as Murdock. The difference between Burgess's shooting and Fredette's shooting as far as percentages go is almost the exact same difference as Fredette's shooting and Murdock's shooting.
I think some of you are exagerating other team's gameplan for Murdock. You make it sound like no one guards him. That's a bunch of balogna. When you're the point guard, you always have someone in your face. When Murdock does shoot it, it's the times when he is wide open, which isn't that often if you look at how many times he's shot the ball.
I love Jimmer right now as the back up SG/PG where he can get some good minutes and bring some needed energy off the bench. If it isn't broken, then don't fix it!