Colliton is a place-holder. He served his purpose in being someone the org. could use to replace who they wanted out at the time, which was Q. He also can be yet another fall-guy if things don't go well this year.
Bowman's past 2 off-season were complete opposites of each other. He actually tried this off-season. The one prior (Q's last off-season), he did absolutely nothing -- that wasn't an accident. It was almost like he was setting Q up to fail. So whether Colliton is Bowman's guy or not (I think he is; so was Barry Smith by the way, but I digress), the fact of the matter is that, Bowman actually took action to provide him a decent team -- he did not do that in Q's last year. Manning, Davidson, Ward, and Kunitz -- that's really all he provided in Q's last year, which was an utter joke. Shaw, Lehner, and De Haan (and even Maata to an extent) were much more substantial.