Let's not exagerate, Vucinic is neither useless, nor wc.
He has 2 main weaknesses, lack of consistency and shoot accuracy.
As he is a SS, these should be minor issues, esp for a team with so many attacking options.
It's not his fault that we don't have a serious finisher.
As long as he stays focused, less hothead and healthy, he can offer quite a lot, because he is a strong workhorse.
We just happen to have many options of similar profile and little options to complement him efficiently.
If we get a proper finisher, we could make a better use of his SS skills.