Testing submitted maps and other items is reasonably said to be time consuming. IMO we have 4 other arenas that sit idle most of the time, use them as testing grounds. Announce it on bbs that anyone caring to beta test new map or such can go to AvA or DA or TA (or how many more options).
Having said that, I believe that AvA would be an excellent arena to do the same for CT. Give us some peeks at planning room or avatar updates, anything to freshen it up a bit. If anything it will enhance the gameplay all over. More interest in dormant arenas will give the veteran players a place to cool their heels and still get some action instead of flying solo and strating fields.
Only worry for me is malicious files chewing away at my HD. Must be a way to check for that and let her fly!