Mages-trainable ice block?

just watching vids on youtube there. arena vids . and it got me thinking about mages having trainable ice block. now i play a 70 mage myself. manahara if u must spec him. hes frost so i know mages well and i dont wanna v off against a mage if im pvping on my hunter when they have IB trainable. well anyways to my point. if i was arc/fire spec and if i wer to have trainable ice block and i did arenas with my priest friend i think i would have a totaly unfair advantage over every1 else. for example.

1.frost mage/any other class = mana sheild+ frost barrier + iceblock thats good survival
2.arc/fire or full fire/ mana sheild but big dps
3.arcfire/full fire +priest= huge dps and nice survival

when mages get iceblock from trainers.
4.arc/fire +priest = mana sheild+priest sheild +iceblock = big damage plus all the survivabilty of a frost mage.

mages are gona be so overpowerd because of one single spell its realy going to shake things up in pvp. personaly i dont think this is a good idea.

tell me what you think =)