I'll keep this short.
I hope they eliminate the problems they had in Volume 2.
1. Too many characters - I hope they do something about this or "pair up some characters" [Maya, Sylar, Alejandro; Matt, Molly, Mohinder; Hiro and Takezo Kensei; Niki, Micah, Monica, Peter and Adam, etc.]
2. Lousy writing - This is self-explanatory [In "Powerless" why didn't Peter just phase through the door instead of using telekinesis?]
3. Slow pace - Hopefully the pace will get faster in Villans.
I think those are the only major problems, though there are still some minor problems.