From an overall perspective, I like Miz and have for a long while. He's pretty decent inside the ring, nothing dynamic but solid, he's loaded with personality, he's able to connect with the audience to generate strong responses and he's damn good on the mic.
I do believe that Miz has gotten a bit of a raw deal from WWE over the course of the last 7 or 8 months. Initially, it was reported that Miz was getting blamed for the relatively poor buyrate for Survivor Series last year. As I've said in other posts, the WWE is to blame for that as they didn't create intrigue by building Miz & Truth up to look like threats to Cena & Rock. WWE felt people would pay out the ass just for a "feel good moment" with the in-ring return of The Rock. Turns out, pretty much, they were right according to an article I read yesterday on the WZ main page. According to the article, the WWE announced updated figures for Survivor Series and it's now being said that last year's show drew well over 300,000 buys. One thing that Miz did deservedly get heat for was the botched spot with R-Truth on Raw. Miz actually looked as though he stepped out of the way rather than helping to catch Truth.
In the grand scheme of things, Miz is someone that's gotten a lot of unfair hate from internet fans. A LOT of WWE wrestlers do, especially when they make it to the main event scene or look as though they're about to, but Miz got as much as John Cena, especially during his title reign. A lot of people complained that Miz looked "weak" during his run as champion given how he cheated to win just about every match he had, those same people completely ignoring the fact that heels are supposed to cheat. The thing that I find ironic is that a lot of fans who watch both WWE & TNA have panned Miz for having a long but "weak" run but heap praise upon Bobby Roode for relying constantly on cheating & outside interference just as Miz did.
Personally, I think Miz needs a character change upon returning. He's gone as far as he can with the type of heel persona he's been playing for the past several years and definitely needs to be freshened up.