Just because can Dorn outhit Stubbs at this point has little to do with future projections. Stubbs was supposed to be a raw college player when he came out, so it shouldn't be a shock that he's behind many of his teammates right now.
Stubbs is going to be a guy that will move along quite slowly (which is one of the reasons that I would have rather have seen Lincecum drafted), but he also has the talent to improve much more than some of the more polished guys right now. Many of the guys you listed that currently outhit Stubbs, don't have half the talent that he possesses. He's likely to improve at a faster rate than his peers, as he is quite raw and has the talent to play at a top level in the big leagues.
Like a few others, I did not want to see Stubbs drafted by the Reds at that position. However, I still saw Stubbs as a solid prospect that does have a chance to be something special, even if it's going to take a long time for it to happen. I rarely have a huge problem drafting guys who have top end talent while the ability to play a skill position at a high level. Stubbs has a long way to go, but the fact that he has struggled to date in his first season of pro ball is a poor indicator to use to judge the rate and potential of his improvement.