I think a lot of that was the foot injuries, though. Look at a few of the routes from his rookie year for example. Not all of them are clean, of course, but he does display remarkable body control and suddenness for a 6'3 plyaer.
Not a lot of wasted movement, gets a clean release, threatens the outside shoulder to get vertical, and then stops pretty quickly to get 3 - 4 yards of separation on the comeback. It's hard to ask for a lot more separation than that in the NFL.
Or how about this double-move for a touchdown?
And the next route, another sideline comeback route, earns him 6 yards of separation at the 1:34 mark. That's pretty embarrassing for a DB.
My point is that we all know the negatives surrounding Dobson -- and I'm not going to pretend like he's the next big thing or even that he's likely to earn a roster spot -- but his route running doesn't seem to be the problem. Let's see how he does now that he's healthy again. Pre-season should be interesting to watch.