I find it impossible to justify upgrading 10 accounts let alone 5.
if they wanted to eliminate multi boxers they have had success with me, they will be lucky if I buy one upgrade as it is. I don't even know if I'll waste the money or effort in moving characters around so I have the most to play with if I went solo.

I hate the WoLK questing and from all I have heard it's just more of the same in Cata. I may try Lord of the Rings... it's free.