At the very least it means he's well behind the development curve a defenseman his age should be at. And if he's that behind in development AND playing poorly AND whining about his playing time and asking for a trade (at 22?! Barrie, at his age and tenure in the game is a little more understandable), I just don't think it's worth the time and asset investment to try to bring that talent to fruition. Rather stick with Stastney and Del Gaizo, with Molendyk also in the wings over the next year or two.
And, frankly, Edmonton is not only poor at development, they have also been very poor at talent identification/selection, so it may not just be an issue of them handling him wrong. Book I hear on Broberg is that he's a guy with many tools, but no toolbox, which is an unteachable thing.