actually thats not a horrible idea, having everything to 50 and properly geared up, I like to switch it up every now and then when doing regular instanced content. Tough, I suppose it would be hard to do if it has to check your item level too. That would be the hard part of the implementation. But I suppose the easiest way would be to find a virtual dice and decide which result would be the class you ran on, then finding out what class you want, then sign up to said content that you've switched over to. It's at least a way it can be done without the need of SE developing a tool for it.