Just want to share my experience from a couple of weeks back as it may help those trying to get on the ride. We were staying onsite at CB and made sure to get to the front gate of Uni by 7:30am for early entry. When they finally let us into the park, TM's were announcing that Gringotts would be down for at least 90 minutes. This was our last day at the parks and we were pretty bummed since Gringotts was constantly above 120 minutes the other days we were there. So we went up to the front entrance of the ride and talked with a Gringotts TM who said we could either wait in line with everyone for the ride to re-open or come back later, find him and he'd express us through. Sure enough, the ride re-opened a few hours later and we literally got through the whole attraction in under 15 minutes. Universal TM's were amazing our entire trip. Just be nice and explain your situation. I've found that complaining doesn't work as well as being genuine and kind to the TM's at UOR!