I can’t recall my experience with Mantis, considering that was the day before Disaster Transport closed and I was 12 at the time, but I rode Rougarou last year and good lord I hope that’s the next coaster to go at Cedar Point.I've done three floorless conversion B&M stand-ups now (is that all of them?) and none of them are super comfortable rides but, at least in the case of Firebird (the only one I've done before and after), it is still an enormous improvement. Definitely not saying that a relocated, floorless Green Lantern would be a flagship coaster, but there are parks in the chain where it would still probably be one of the stronger attractions in said park. Think about, say, SFStL. Swapping the likes of Ninja out for a converted Green Lantern would be a monumental upgrade to the park's lineup.
I’m not one to complain about a coaster being rough, I’ll defend Arrow loopers all day long and I’ll take historic wooden coasters over most B&Ms, but that was the first time in my life that I’ve had to take a break to recover after a ride. Ironically, the next coaster I hit after that break was Corkscrew, I’ve never had an issue with it the way a lot of people seem to.