Plot suffered from characters becoming too powerful without limit, getting painted into corners, and rules of their own universe being broken for dumb plot points at the last second. If they don't put much better constraints into place, it'll just suck.
That's what I remember, it was supposed to be an anthology season, each one new stories of people gaining powers and leaning to use them. Then "save the cheerleader save the world" was so damn popular the exec's wouldn't let the characters go