1 account will still allow up to 5 characters. you just cant multi box. and yea as omi said it will be reserved more for no lifers and hardcore AA players.
family sharing of housing will become crucial at some point.
I doubt I'll have time to keep up with more than 1 character. At least I'll be decently geared. I'm not too fussed about farming and house owning straight away like I was on the origonal launch.