Nothing, because it has this style carabiner clip for the collar....Whereas Tempesto has a seat belt buckle and since the restraint doesn't actually lock... if you accidentally poked the buckle release the entire upper harness flies open (mid ride)... and they even have signs in the station and I believe the audio recording telling you not to hold on // touch the shoulder harness (comfort collar) and it was either SeaWorld San Diego or Busch Gardens Williamsburg where they had a unnecessary news story where the harness opened mid-ride and the rider "feared for their life" situation
I suspect perspective is being a little deceiving. If you look at the first picture, the track actually looks about even in the two elements (I'd almost go as far to say the inversion looks a bit lower), and bear in mind that the centre of gravity of the train will be a good distance from the track itself. I reckon it's probably okay.
I know I should expect it, but I'm amazed that Six Flags is just ok with closing down an entire section of their park to slog along on ride construction. When I was there two summers ago, Riddler's Revenge was closed due to Battle of Metropolis construction. If they actually gave a ****, they had plenty of space to build a temporary entrance, but they probably viewed it as a cost save since they didn't have to staff the ride for half the season.