iOS 9 isn't what I thought it would be. Apple promised smoother animations and better battery life. I'm not seeing either. Sorry, Apple. Control Center is much smoother on an iPhone 5 running iOS 8 than an iPhone 6 running iOS 9. I don't understand how Metal was implemented and everything just got worse. Hopefully they clean up a ton for the GM because right now I'm not seeing it. I will do a clean install when iOS 9 goes public though so let's hope that fixes things. Public Beta is everything but clean.
Anyone else notice how spotlight lags and hangs a lot more since iOS 9 beta 5 (PB 3)? Especially if you slide up and down really fast it hangs right in the middle of the animation. Also, sometimes the Siri suggestions appear but nothing else blurs then you get stuck in spotlight and it won't go away. The app switcher is stil causing frame drops on both my iPhone 6 and iPad mini 2, however it's better than it was before. Exiting and entering the switcher is where it is most problematic, and even sliding away apps is a little laggy and scrolling drops frames too. It's a mess. On iPad if you hold two fingers on the keyboard and let go, it gets stuck in trackpad mode.
These have existed since early iOS 8.0 betas, some even in iOS 7: Splitting and moving the keyboard still causes the non letter keys to turn dark gray and it lags and stutters and has graphical artifacts. Popping up split keyboard is weird, it is connected for the duration of the animation and then it snaps back to being split. Rotating App Store stutters, rotating spotlight stutters, rotating keyboard stutters, control/notification center over keyboard stutters, control/notification center over open folder stutters,