When you put Savos Aren's amulet on, it's registered as an Adept Hood in the active effects menu.

The quest where Brelyna Maryon tests a spell on you doesn't work. The quest says to wait until the spell wears off but nothing ever happens.

A number of bodies don't seem to disappear. For instance, a bunch of Ice Wraiths attacked a town but their bodies never disappeared. I'm talking about 30 hours of game play and they're still there.

That's all I found during my play.

The Quest with Breylina works just fine. I completed it with no problem at all.
Just wait a few ingame hours since the effect wears off, then talk to her again.
She then casts another spell and the Quest is done.