I am having some misgivings about the new Battle.net account information merge. On the one hand, you have a single password and login for multiple games including WoW. On the other hand, you have a single password/login for multiple games including WoW.
The misgivings stem from the fact that if someone knows your email, they now know your login name. Before, even if you had a PW, you still had to figure out the login name. This just makes it easier for an account to be hacked.
Add to this the myriad of posts about issues steming from the account merge process and you have a system that screams Skynet. You'd think we would have learned that streamlining some things can lead to bad results. I'm not a fan of the idea.