Have you guys ever considered Quadruple XP before?
I'm sure the individuals whose responsibility it is to set these events up has considered it, personally not sure on it ever happening though.
While i'd personally love to see it happen, I wouldn't even begin to wonder the sort of impact that has on progression and even the servers too... Imagine a ton of people progressing at 4 times the rate things were originally intended to be at? Would be mental in my eyes, but that's just my thoughts :D
Some within the community have even been asking for more than 4X, mental!