Good arguments but over exaggerated number and scenarios are thrown by warriors on this thread to defend their case.

No, warriors and mages will not be useless if procs are stopped upon gear switch as Futumsh mentioned in his comment. Because procs from weapon and other gear that are equipped will still stack. Level 76 arcane gear is powerfull enough for every class to be OP and be able to solo any map except the elite gates.

I have tested it and devs should test it themselves as well. They should decide based on actual data and numbers. Record the gameplay of players who use this exploit, compare it with the ones who dont and you will see what they are actually afraid of.