In my personal conversations with a friend who was a mechanic on Deja Vu for it's entire life at SFMM, majority of downtime issues were caused by the way that the catch cars were designed to catch the train. SF Corp bought a new train from Premier to increase reliability which it clearly hasn't. Unless the catch car design changes, I don't see reliability improving.
The hydraulic system used on the catch cars is a very complex system. In SFMM's defense, the last year Deja was at the park it ran pretty damn good with minimal downtime.