First off I gotta say I love that the mob choir was created specifically for this show. They killed all the intros.
Secondly this really was a show about loving yourself and accepting that even if bad things happen you shouldn't limit yourself or your emotions. Cause those people who hold it in are just a breakdown waiting to happen.
Also I interpreted him accepting his powers as he was always slightly afraid of the damage he could do but now he just accepts that it's apart of him. In terms of him using it more often I guess that's maybe an open ended thing. He'll live his life normally and use powers if necessary most likely.
Last minor minor thing. In the intro their chanting "Mob, mob, mob" which is funny since there really is one and only one mob.