I have; no blinding AM sun, no snow to slide around in, rain keeps many pedestrians/bikes/runners inside, on and on. On top of that it's a holiday week so traffic is down. It's awesome!
DIT correct on this one, especially given ski resorts and other winter activities are largely shut down too. You lose over 1/3 of winter (possibly much more), not only snowless but torched, it must be weighed in there.
The last thing any resort should try for is drawing larger crowds when conditions suck and terrain is so limited. 14 trails at attitash, you really want to pack that two miles of terrain so everyone's running into each other? Also reducing rates for bad conditons/terrain would sort of set a standard or precedent that when conditions blow, lower prices should be reflected.