I just wanted to add my voice to the chorus. I upgraded to 9.0 and had apps keep crashing on me. After trying the usual restart and hard reset (I elected not to give the backup and factory restore a try) I decided I couldn't live with it and was thankfully able to retrograde to 8.4.1.
I will note that I have the 64GB version and deleted off a good chunk of my video so that I had more than 10GB of free space and performance/stability did not improve. I can understand keeping 1-2 GB free, but if I have to keep 15-20GB free, that kind of defeats the purpose of getting the big one. And it has worked fine on 8.x when I keep around 2-3GB free. Yes, it's a little sluggish, but I realize it's a 4 year old device and it was never lightning fast to begin with. I try not to compare it to my 5C as that is a couple generations newer. I still have one app that crashes on loading 2-3 times, but I have learned to live with that quirk as the app does load and is stable once loaded. This is on 8.4.1
I agree - if you haven't upgraded, don't. I'm going to wait and see if 9.1 fixes the crashes. I should be able to play more than one level of a game, scroll through more than a dozen Facebook posts and look at more than 3-4 Safari pages without crashing.
Apple should give iPad 2 owners the chance to downgrade so that our devices are not bordering on unusable, even with an official Apple app
I'm bummed as I was looking forward to the multi-tasking (though honestly a bit curious as to whether my iPad 2 could handle it). Honestly, this reeks of a push to get us to buy a newer iPad, even though there were no upgrades this year. I had been thinking of getting a replacement, but I know if I do so, the new one is coming in less than a year and since the iPad Air 2 wasn't updated.