No the stuff with the scrims started about 20-25 years ago when they cut the budgets on third shift, they also got rid of the unique menus at all the restaurants on property around the same time, both were cost cutting measures. The only thing they do regularly in the over night hours now is cleaning/street sweeping, and putting up the different holiday decorations
There's scrims around the carousel every few years now, and there is almost always one building on main street behind scrims. If the Florida weather is so harsh on these buildings then the need to "replace" whatever that problem material is instead of constantly "refurbishing" it. I can't ever remember seeing scrims around the buildings on Hollywood Boulevard at DHS, is there something vastly different about the buildings on Hollywood Boulevard and Main Street? They are both the entrance ways to each park, the first thing the guest see shouldn't be scrims because the buildings are rotting. The whole purpose of this WDW resort is to immerse the guests into these different fantasy worlds, and the carousel the centerpiece of Fantasyland, there's nothing magical about riding a carousel that looks like it's wrapped up in a fumigation tent
