I wish they would just change the behavior of having to wait until the spring/fade animation completely ends before you can start doing something again.
Say you are in an app and you hit home. The animation starts. In 8.4.1 and below I can be tapping on the next icon I want to open from the springboard and iOS knows it mid-animation and when the animation ends it immediately begins opening that next app. I love it. It's fast feels great.
In iOS 9 you have to wait till the animation is completely over before it registers your tap! So I'm sitting there tap tap tapping away at least 3-5 taps before things get moving again! It was jarring and it was the first thing I noticed in iOS 9 and it just feels clunky and weird.
Sure once things finally open performance is similar with iOS 8 but it's all about the fluidity and it just isn't there in iOS 9 yet. If this ever changes I'll be on board. Until then my 6 will stay on 8.4.1.
Is it still like this in beta 4?