I always liked Pavlovic. He was a guy Danny reportedly liked when he was drafted, and he is a shooter who was always a very underrated defender. I never understood exactly why he has had so much trouble catching on with a good team since his last contract (where he was admittedly overpaid a bit) was bought out. As an end of the bench option, I think he would be a very good guy to look at, and I would argue that he could help this team more immediately than Brewer (who I see as more of a long-term project).
What discernible NBA skill does Pavlovic have that isn't already replicated on our roster, though? As least Brewer can come in and play elite defense in spots. Pavlovic is pretty much below average at everything. Last year, when he and Brewer were on the same team and were directly competing for minutes, Brewer showed himself to be the vastly superior player, in my opinion.
I am not sure if he has lost a step, but Pavlovic was an above average defender in Cleveland, has been at times a very good shooter (he has had a couple awful years), and most importantly, has done it in the playoffs (he averaged 30 minutes per game in the playoffs when Cleveland went to the finals).
Brewer on the other hand has had trouble producing on one of the worst teams in the league, and is, IMO, highly overrated defensively.
edit: and to clarify what I mean defensively, I think he is like Tony Allen up until last year. A ton of defensive talent, but completely missing the consistency you need. He will follow up great defensive plays with major lapses. I think he may grow out of that with more experience, and proper coaching, but we don't have time to wait.