I'm overall happy with the merge - I wish there was more benefit to it though; like the ability to switch from one account to another without retyping your password in game (the switch like that only works with the web admin so far) - or even nicer would be the ability to do BOA = all battle.net accounts

The battle.net use a different server for auth and at some point you need to copy/link the launcher in addition to the wow executable for other copies to work; also I've had a few times I couldn't log in using battle.net but still could log in with my remaining non battle net account - but that hasn't happened in a while so I figure they ironed out the kinks now ?