Mage is going to be OP AF, their pets by that expac look to be back to normal.
The problem with pet classes on these TLPs is that the raid bosses all pulse an AE that agro's pets which is meant to debuff player resistances to make it tougher. A lot of people just cant control pets so when pullers are splitting and the AE pulses through wall etc they end up agroing the boss (all pet hate goes to owners on TLP's). I would say its 100% np as the AAs are in to lock your pets now.
@Zithax nice dude, Toxn and them did trials on beta last night and said they were much easier than expected.
@Yerm most people will change their mind 10x before, a bunch of us are playing whatever is needed to fill in the gaps.