I'm curious, have there been reports on how the masks work with rollercoasters?
I haven’t been on one with one myself yet, but I frequent some coaster forums and the general consensus is it’s not a big deal. Many parks did extensive testing (Sea World testing on Mako generated a lot of online attention) and found that as long as they are properly secured, masks generally stay in place.
Disney’s coasters aren’t among the most forceful out there by any measure, so it shouldn’t be a problem. I think the water rides are a greater issue.