How does changing a name work exactly? Say I buy it, then I enter game to rename, and find out the name I want is taken. I've basically wasted the points that way. I didn't try it yet, so I'd like to ask if this is how it works, or is there some sort of prevention for cases like this?
works the same way as if you were naming a new character. if the names taken it's taken. you can create a new toon to see if the name is taken or not, but after deleting it i believe it will still show as taken until a server restart
Your accout also stores your deleted characters until you delete them expressivly. Anyway, given the many players that just try wow for start but never play afterwards, you need to wait for the next user database cleanup or be very, very, very original with your name choices.