For anyone defending Apple or this 8.0.x update, I'm going to go out on a limb and guess you don't own multiple iPads that you use for work.
In my family and my business, we own 5 ipads... Two ipad 2 16GBs, one iPad 2 64GB w/ cellular, one ipad 2 16GB w/ cellular, one ipad 3 16GB with cellular, and an iPad mini. We also have one ipad 4s in the family. Without exception, each of these is running miserably since the upgrade except ONE!!!! The one that is still on iOS 7.....
We've tried every tip we have found. We have attempted to revert the most important of these devices to iOS 7, but the restore fails so no apps would be configured. Without my apps, I might as well stop working. But, with them, on iOS 8, I find myself using my android phone and my windows notebook now.
There is zero excuses for this. It was poor planning on apple's part. And the standard line of "you should consider the new Apple, which is designed to take advantage of iOS 8 and future releases", has only served to tick me off.
Our devices are not enjoyable to use, and we sure cannot be productive with them in a work environment.
I'm going to go write up a long, scathing blog post about this, because, if I post it here, it will be deleted. I would have posted a link to a great blog post someone else wrote on the subject, however something as simple as copy and paste us not working on this iPad. Just typing this reply was painful because of the new and enhanced keyboard lag.
TO any of you who are not having trouble, I'm very happy for you. But trust me, there are many more who are having problems than you see here.
Several people who have attempted to express their feelings and describe their issues here have had their comments removed btw.
Good luck to anyone having the same issues we are.