The phasing is quite welcome. I've heard a little about this, on the beta forum earlier. Good to hear it is going ahead.

At the moment, the choice is all of the accounts on one battle.net or a battle net per account. So you basically have to choose between ease of logging in vs ease of managing multiple accounts. It would be nice to be able to merge the accounts into a single battle net, but retain one code to log them all in.

Not sure how BG's and Rated BG's will work. This one will be a major factor in deciding whether to continue with Cataclysm as a boxer who is more hardcore/casual. I want to join as a group of five, but be able to run rated BG's often. From what I've read, you'll need to queue as a 10, 15 or 25 man rated group, which would limit rated BG's quite a bit.

I don't see the ground target AoE's being targetable on a specific creature. Aside from Seed of Corruption, they don't seem to follow this mechanic. Not saying it wouldn't be fun or cool or make boxing/solo play easier.