To try and get on topic a bit!
I will go with.
1) You only need to buy the current expansion to get access, or at very worst £10 for battle chest that includes everything up to the current expansion.
2) Free (with a 90 day cooldown) server transfer, race/faction/name change stay as they are you can pay to move outside of the 90 day CD as you can now.
3) Add something unique (something a bit out of the box).