I visited on Monday and had a similar experience. I was very disappointed to find the Flash closed all day (and, of course, it reopened the day after I left! ugh). But aside from that and Joker having frequent breakdowns throughout the day, I had a nice time. Superman, Medusa, and Batman are the "powerhouse" coasters in the park. All three of them seem extremely reliable, and I didn't see any of them go down the entire day. Those three coasters had the fastest operations in the park and ran at max capacity. Superman dispatched every minute, often times less.
Joker was on two trains, but like I said it had frequent breakdowns. It seemed like they sent more empty trains that day than full ones. When it was running, the operations were solid. It's a nice ride but still ranks at the bottom of the RMCs I've ridden. But even a "bad" RMC is a GREAT coaster. It's also incredibly popular and held a solid line.
Batman surprised me. I've ridden Joker at SFGAdv, and while this one felt mostly the same, I did flip much more on Batman. One of my rides I flipped a good 6 or 7 times. It was totally awesome. If it flipped that much on every ride, I would rank this as one of the best rides in the parks. And while I still think it is, the experience can be very hit or miss. Some rides are insane, some are very mild, and everything in between. Overall an excellent addition to the park!
I really do like the park and think people give it way more crap than it deserves, however there are a few drawbacks. I was watching queue times for the weeks and days leading up to my visit and the Flash was operating on almost every single day. Considering that the ride just got out of an extensive refurbishment, I figured the odds of it being open during my visit were pretty good, but it just goes to show that you can never really make assumptions with Six Flags, particularly their unreliable Intamin rides. It was also frustrating that it reopened the day after I left. Oh well, that's life. One day I will ride that thing. It looks totally weird in the best way possible.
I'm interested to see the future of this park. Their ride side of the park is quite stacked. I'd like to see a drop tower at some point. Even with their 150-foot height limit, they could spring for a Larson tower, S&S shot tower, or even an Intamin one. A family coaster with no inversions would also be nice. I wonder what their future moves will be with CGA expected to greatly expand in the next 10 years.
Steel: 176 / Wood: 32 / Total: 208
Home Parks: Knott's (when home), Lagoon (at school)
Favorite Coaster: Intimidator 305