Lots. The motors could not provide adequate control of the doors so it overshoots or undershoots sensors (wind, rain, weight, etc as factors). Plus they're just freaking giant sails. Maybe they don't open quick enough or close quick enough for the ride vehicles.
Anyway, thanks everyone for the support and information, I think a lot of guests became fans of Universal through Diagon and this project is their first new built. Lets all chill, wait, and celebrate when softs start hopefully very soon (please god by May 12th, please god.)