I had an idea regarding the costumes and the endless requests for new parts that everyone has been waiting for. It seems like there's never enough parts for every idea we all have. I thought of a possibility, and I think... it would work pretty well.
There was a game made about the same time that City of Heroes was first released, titled "Freedom Force." Also a superhero game, but not an MMORPG by any means... but the players were able to make their own characters to insert into the game. And they were able to make these characters using programs made available by the game developers, so that they could share meshes and skins and animations with other players.
The CoX graphics engine for the characters is very modular. That is to say, we have the basic figurine (male/female/huge), and then each individual part is then "hung" on that figurine to create the overall appearance. This is why, back before custom weapon appearances were available, I predicted that it was possible to make them so. A broadsword is still a broadsword; only the polygons and color scheme have changed.
What if the developers were to release a costume parts creator program that players could download, and then use to create their own costume parts to submit for approval? I say approval because costume parts have to be in everyone's "library" to be seen by them, and developer approval would prevent the release of horrid and poorly rendered parts, or offensive parts.
I know that a number of players have been wanting to see wolf/fox tails to go with the lion, tiger, rabbit, etc tails. This would allow them to make the parts for themselves; the developers could then just pick the best of what comes to them rather than having to make it themselves.
