This is a stupid, superficial point, but one of the major things that has irritated me about Heroes in the later seasons is the fact that it seemed like they were constantly adding new hot blonde chicks onto the show that were all attractive in the same boring way. It seemed like the point where I gave up on the series (somewhere in season 3), half the female cast was super hot blonde chicks, which just felt... silly to me.
The other part that bothered me was the fact that it didn't seem like the show was ever *going* anywhere with any particular plan. I've done NaNoWriMo enough times to know what it looks like when writers are winging it, and after the first season Heroes always had that general feel to it, both to the detriment of all of the characters and to any semblance of plot.
To Union Dues: The sort of "regulated monopoly" feel that the Union has is one that I find really interesting, and the obvious conflict with the mercenary police force is something I find fascinating. The arc of this season of Dollhouse, which is related to the take down of a powerful organization with tendrils in government, academia, etc has a dark feel to it that I could definitely see Union Dues taking on, though I see a much grittier world in the Union Dues story. (Since Dollhouse has been canceled, it might not be the best thing to be taking lessons from, but I still thought that the world-feel of it's current story arch is really interesting.)
The part of Union Dues that I find really interesting-- and different from most superhero stories-- is how helpless all of the heroes are, individually, against the Union itself. Between the imprinting and the general power-- and governmental sway-- that the Union holds, you get the idea that the heroes have a lot of the same problems with modern society that the rest of us do. Like us, they're cogs in a machine that's being controlled by people we'll never have a chance to influencing; because of the regulations regarding their powers they really have even less agency than we do.
Also: Holy shit this is awesome.