Disclaimer: I reset the iPad and set it up as new. I also only use Safari, comiXology, Kindle, YouTube, and watch movies.
I'm a firm believer in not upgrading iOS past 2 generations of a device since they tend to slow down dramatically. iPad Air 2 launched with iOS 8 so I wanted iOS 10 to be my last update but I took the plunge and happy to say there is zero lag with iOS 11 on my iPad Air 2 and it runs just as smooth as iOS 10. In fact, my movies actually load faster when viewing the TV app because with iOS 10 there was major lag and stuttering if I changed the tab between TV shows and movies.
I'm a firm believer in not upgrading iOS past 2 generations of a device since they tend to slow down dramatically. iPad Air 2 launched with iOS 8 so I wanted iOS 10 to be my last update but I took the plunge and happy to say there is zero lag with iOS 11 on my iPad Air 2 and it runs just as smooth as iOS 10. In fact, my movies actually load faster when viewing the TV app because with iOS 10 there was major lag and stuttering if I changed the tab between TV shows and movies.