This change isn't a big deal for me. I don't like arenas and I STILL won't like them. They already have this in BGs as well. But yea, if you see you are versing a certain team, you can change from 2dps1healer to 2healer1dps, etc, to combat it, so I don't think it's a good change.

Only things arenas are good for are quick points if near the end of the week and still short.