I just skied today on a pair of rockered skis (I rockered them myself so they weren't great) and they where amazing. Effortless butters, manuals in complete control. I did a nose butter 900 without my tips ever leaving the snow. You can control you spin while buttering and pop out of it at anytime.
They rode surprisingly well out of the park on groomers, the only place I really even noticed a difference was on shere ice, they slid like nothing else on ice.
Jumps where my only real issue with them and even it wasn't a big deal. They just make it harder to ride something out if you land backseat or off balance, however if you land solid you'll ride out solid. I did some switch cork 5s and rodeo 5s on them. They made little to no difference on rails, only spot it made a difference was when sliding off of the rail and if anything they where kinda nicer when sliding off rails, not that that really matters.
All in all rocker in the park is sick and in a few years it will be common I assure you