One of the things I couldn't stand watching Vucevic is how often he would slow the Bulls offense down by playing in the post, and he wasn't especially effective there (29% percentile of all players this year).
If he is content with the 1-2 postups we gave Horford a game, and then primarily facilitating out of the high post, then he could be a helpful player for us.
I agree with others though. This is primarily motivated by getting us out of the 1st apron and resetting those penalties. But the second benefit is adding a different type of big to our rotation.