A majority of players are Heroes on Homecoming. At least on Excelsior.
I made my main a vigilante so that I could experience more of the games content on my fav character, only to find that the Rogue Islands are largely abandoned. It's depressingly hard to find a teamup. I'm always watching the LFG channel for red side teams looking for more. If I'm not already in a group, I try to prioritize doing red side stuff. I have a feeling I've only scratched the surface over there.
For all those that don't know. You can go to Pocket D and change any characters affiliation to be able to go into both red and blue zones. Just talk to the seagull named Null the Gull on top of the parked box truck in the club. For no cost at all, you can just tell him you want to be a vigilante or a rogue and unlock a ton of content for that character.
Even better. With the Oro teleporter, you can very quickly just teleport from blue to red and back again without even having to run through Pocket D. Other then character themes, I can't think of any reason why a player wouldn't want to open up all that content.
However, if you do, don't get discouraged to much when you cannot find a group. It's that problem that makes it worse. People say they don't go red cuz they can't find groups, and that makes it even harder to find red groups.