Champions Online has been the subject of these discussions perhaps more than any other title in recent times. While some of our collective feedback must get back to the Cryptic Studios developers, one of the best ways to get through to them is by participating in their dev chats. There is one coming up at 4PM PDT this Thursday, October 8th, and the topic du jour will be the "Hero Games" PvP arenas.
The main way that the devs will be taking questions is through this forum thread. They plan to go through as many of the questions posted there as they can, but the audience will get a chance to ask some follow-ups or extra questions at the end too. The IRC channel is #championsonline at irc.coldfront.net, or if you don't want to use an IRC client, there is a Java chat client available as well.
So, if you think the Hero Games in Champions Online could be improved somehow, get a few questions ready (remember, the questions thread on the forums gives the highest chance of them being answered) and let your voice be heard this Thursday.