Swiping up from the dock and going in and out of apps in multitasking view is still stuttery. We’re nearly up to 11.3 now and it’s still god awful. This is on a 2017 12.9 iPad with ProMotion by the way. It feels like it’s running below 30fps it’s that bad, and given the hardware it really shouldn’t be. Giving up with these betas because iOS 11 is just a poorly unoptimised pile of crap no matter how many point updates they release. Will have to wait until iOS 12 now in hopes they’ll focus on nothing but performance, although knowing Apple these days they’ll probably make it even worse.