I updated mine to IOS10 a couple weeks ago.
One thing I have a hard time getting used to is the change to opening it up. I am so used to swiping it that I do that by habit. Now when you press the home button then swipe it, you get a display af junk presented to you to touch and read.
I do find that rather annoying and don't like it. As mentioned you have to poke the home button twice now to open it.
Same thing on my iPhone. While I'm sure I'll eventually get used to it, I personally prefer it the other way and wish that Apple would stop messing with this kind of thing.
iOS 10 has already issued an update to it. Just installed mine tonight on my phone. They bug you to death if you don't update.....