Not sure what you mean with the saber dance thing. However my reasoning for upgrading Fan Dance 1 to Fan Dance 3 is that I think we will get a Fan Dance 4 (basically an upgrade to Fan Dance 2) next expansion. They could always make Fan Dance 3 single target an deal more damage to accommodate this. Also RDM doesn't seem to have that much of a problem with AoE and it's AoEs are exactly how I would want DNCs. I doubt SE will ever change DNC AoE but that is how I would want them.