Our MoP realm is in a bad state.
I think u are a better off with playing MoP on a different private server.
Nevertheless wotlk is anyway the better expansion when it comes to multiboxing in PvP. With every expansion afterwards they added new AoE CC abilitys that **** multiboxing up. In Cata its the super annoying ring of frost and solar beam and in MoP it seems like pretty much every class has at least one AoE CC ability.
I was in situations on Frostwolf where my whole team was for like 30 sec in a CC chain.
http://cata.openwow.com/spell=82676 ,
http://cata.openwow.com/spell=78675 ,
http://cata.openwow.com/spell=46968 , disrupting-shout, fists-of-fury, ring-of-peace and the list goes on and on.
This makes me wanna multibox ele shamis on TBC because there were hardly any AoE interrupts at all. Not even push back effects.
I guess multiboxing ele shamis there would be even more powerful than on Wotlk.