- Lack of trust in the Battle.net system since some players who converted had their account hacked after (Solution: Get an authenticator)
- Privacy concerns since email address is the sign-in
(Solution: Make a new email address and use that instead of your personal or work email)
- Multiple account hassle
(Solution: It's one email login where you can choose which WoW account to get into and yes, you can login simultaneously to different WoW accounts attached to the same Battle.net account)
- My WoW account has a different name then my Battle.net account
(Solution: Don't buy accounts)
- I'm too lazy
(Solution: Guess we won't be seeing you in game anymore)
Regardless, Blizzard appears to be adamant about this. I've had a few guildies myself who didn't like the idea. I've heard some players were considering quitting which I find extreme. Over what? Because Blizzard's implementing streamlined account changes for the sake of security and convenience?
Come on now!
If you're a GM with players like that, you're not going to have much of a choice other than to call their bluff. Start shopping around for other players to fill their position if they're serious about leaving. Because once November 11th rolls around, you really don't have another choice.
Those are my personal thoughts on the issue. Where do you stand?