I'm glad they didn't. Sure there is the problem in the summer season but parks always seem to empty out when there is a bit of a rain although often it's only for a short time (I guess people are made of sugar). The cost of building the enclosure would be extremely high so it would become a smaller coaster in a box like Disney is building and that comes at a cost because you don't get these long stretches and a long coaster ride. Above that I love the real trees and it will look stunning when I visit in the winter after FW has opened. Also having a day and night option on a ride it amazing and an added bonus.