Champions was my main MMORPG until recently, but it bites in the teaming / sidekicking area and the world is soooo small - there are like 4 zones you spend almost the whole game in.
I am currently playing TERA (free-to-play). It lacks in the Costume Creator area as compared to CoX - but then most things do

What you have is extreme control over face, but the rest of the body and outfit is set by your role. (At least until you get enough gold / resources to make costumes). And, when you get a good equipment drop, it shows up on your toon as you equip it. So, you don't have much control over what you look like.
On the other hand, the graphics, animations, music and scenery are gorgeous and the world is amazingly huge. There are good stories and interesting characters to meet and it has a engrossing back story / mythology. It should be getting a big boost as it is being added to Steam.
Haven't really had a chance to try the teaming there and there is a open PvP that I hate (nothing like getting down to a few HP fighting a mob of 12 monsters and having some random high-level player come by and snipe you dead).
However, as a temporary pacifier until some CoX sucessor comes along, I can recommend it. At least there is a big enough game world here that you will be exploring it for some time.