I think it would get boring. It works nicely the way it is. I think DK is my favourite Melee rotation/priority system. I also play a paladin as my secondary main. I have in the past played feral druid, fury warrior, enh shaman. I don't care for rogues (or feral for that matter, I just leveled as feral) and I have not really gotten past about 60 on a monk yet. I like them but I just have other priorities.