the reason i am saying it is becus it wuld look alot more diffrent then how other bards from other game look and wuld be more intresting and as most people that plays wow enjoys the rock band thing and it probly build alot more fans around it
does not meen there cant be a spec that use the harp or calm sounding music becus they can even base a spec on MoP theme
there is not reason for not having rock guitar spec