I like McCoy. He has moments that are kind of annoying, but overall he's a good character.
I think the new format they have going might work well. McCoy still has a prominent role (more than any of the other DA's so far), but for now I like the Michael Cutter character. I'll have to see his character develop a bit more, but I think it can work.
When you do things right, people won't be sure you've done anything at all.