I like that they use their powers a lot (looking at you, Inhumans) but there's a couple things holding the show back. The mom needs to go. Since day one she just walked in to the MU and acted like she owned the place. Acts like an authority on mutants and everyone needs her permission for anything. Second, the anger level. Blink is just pissed constantly. Marco, too, to a lesser degree, and then there's Andy with his roid rage. I could see them getting mad, but don't make it so you can't have a simple conversation. They've had a few episodes where they could possibly resolve a simple issue or someone keeps a secret that's obviously going to get out for no reason.
I do like Johnny and his powers are pretty cool, and the Doctor with his mutants is an interesting villain. Polaris as Magneto is kind of weird (ok, just read she's Magneto's daughter, didn't know that) but i really like Magneto and she uses her powers a lot, so it's cool. One thing that really stands out to me, is nhw much Thunderbird looks like Johnny Depp in Donnie Brasco. Uncanny.