Faster no I think the Air 2 has hit its limits of how quick it'll load things, that said it's more than quick enough to handle iOS 10 and probably iOS 11. I can confirm however it is much smoother and the stuttering I've experienced has been eliminated.I've been running the betas on my air 2. No problems. Could be faster and smoother, but that could just be placebo.
Oh it isI don't own an iPad Air 2 but I use that model iPad fairly frequently as they have them at school. It runs absolutely amazing on iOS 10.2, I know. I have an iPhone 7 Plus, so I know what good performance feels like for this day and age in iOS. 10.3 I can imagine is even better on that iPad.
I have encountered that issue but very rarely, usually its trying to rotate to portrait. I wouldn't notice it often though because I rarely do that. Currently I'm not having a problem with that but it could take days to show itself.Does 10.3 resolve some of the bugs in 10.2 on the iPad Air 2? More specifically, mine randomly gets stuck in either landcape or portrait orientation and there is nothing you can do except wait it out and I need to periodically "force close" the mail app or it gets extremely wonky (gets stuck, does not show the entire left pane, becomes un-navigable, etc.)