With five trains it should be a pretty impressive sight, as there should constantly be two trains zooming around the track.
I didn't think they were doing too badly at dispatch times yesterday. The three times I was in the station, they seemed to be going as fast as was practical. I don't think they can go much faster. It's not the staff's fault, it's the design of the ride itself.
I do wonder why they didn't have dual loading like Saw and Oblivion. That way they could dispatch a pair of trains together, hold the second one in a preshow (or even just a holding area in the station, like Oblivion), and ensure the timing of the dueling is always in sync. Currently the two trains are pretty much independant of each other, rather than timed to match. I'd have thought they would vary the speed of one of the lift chains to sync the two trains.