Intriguingly, VelociCoaster has apparently had an operational change, according to a recent video posted by ElToroRyan:
Ride operators now check restraints twice as opposed to only the once (as is typical on coasters), and this has seen dispatch intervals fall from around 55 seconds on average (~1,560pph, ~65 trains per hour) to around 75-80 seconds on average (~1,100pph, ~46 trains per hour).
For context, the ride's previous record was said to be 1,745pph (~73 trains per hour, 1 train every ~49s), and the ride's theoretical throughput on 4 trains is said to be 1,800pph (75 trains per hour, 1 train every 48s). Universal's internal target is said to be 1,440pph (60 trains per hour, 1 train every 60s).
I wonder why the ride's restraints are now checked twice? It seems odd given that most coasters only have one check.