They've really not done as much with the back story between Michael and Fi as I had hoped. Maybe they will touch on it a little more in the 2nd half, but I don't know. Another thing kind of bugs me, unless they are going to tie all of them(management, Strickler, new voice on the phone) together, I really wish they would give some insight into what's going on.
Management has stayed out of all of this, but we still have no clue if Strickler was working for them. And now Diego said someone "much worse" is after them, cleaning up his mess. Ok, exactly how far can this go? I've seen other shows that get going in 17 different directions and things start to not make sense anymore, and I hope this is not the case with Burn Notice.
I still believe that ultimately Michael will have to expose/take down whoever "management" is in order to get back in, and I think that is what next season will sort of revolve around, gaining information about them. But, if this is the case, please wrap up Strickler and the "voice" so we have an idea of who was/is after him. I was also kind of disappointing in the amount of people from his past who came after him. Management said hell would reign down upon him. But really, we've got one old friend and a old KGB guy, that's it.