Regarding burst, another aspect to consider is a spec's set up time (ie target swapping when an add that needs to die quick spawns) (think TFB kephess white orbs or Underlurker adds)
Sure if you can burst for 100k in 3 gcd's its nice, but if it takes another 3 gcd's to set up for that, its really a 6 gcd burst.
(This would have to include dots that proc things and buffs required from rotational abilities)
I have no idea how we could test for this though