I understand what you are saying and yes its fairly simple to do - I'd go crazy if i didn't do it this way. I have 3 tanks and swap priest/shaman for healing and mage/shaman for dps. My dps 'kill' buttons are the same whether mage or Shaman and my 'heal' buttons are the same for priest or shaman.

My totem buttons are empty when playing the mages so its funny when habit kicks in and I hit my totem keys and nothing happens!


I think its a good idea and you should work it that way.