I can see why they're pacing the series, why new characters are necessary, newer villains, etc. but it's not intriguing. it's lifeless. The show could have an episode dealing with paper cuts and having to find toilet paper over 35 minutes, fans would still watch it with anticipation.
I can see the writers and directors trying to replay /recycle new antiheroes and heroes learning the ropes, facing enemies, but it's just not fun to watch Noah Bennett run around doing his thing.
It should be, it fails to live up to the hype because they're afraid of delivering too much too early. When Noah isn't on screen, the show fails to be interesting.
There's no charismatic personalities other than maybe luke/zachary (unrecognisable as chuck, or johnny flame), and even more rarely miko/kiki (katana girl) is emotive or likeable beyond the wooden, stereotyped doll caricature. There's no tension or loss, no risk, no reward, and there's no confluence of ordinary characters with abilities. Hiro and Claire, and later, Sylar, were iconic because they were normal, with abilities. Not so much with the new class.
The show's desperately trying to get the audience to like ... someone, but there's too much mary sue, nobody has failed in a big way, and the season arc is disconnected from the plot in a massive way, there's no fatality or risk in the deus ex machina, already depicted in the poster (avoiding spoilers)
The ensemble cast are "good", but this would get better if it did not exist in the same story as Heroes, it's significantly weaker and less enjoyable as a result of being dragged around by the coattails of the original ensemble of Heroes, that haven't shown up but keep getting name-dropped every few minutes.
This could change, but the show should be so much better or even possibly darker than it is.