Not much change at all. Multi window is cool but it still has memory leaks. Nougat on my 6p is great though. I'm more than ready for a new tablet even though all I do is read books and watch movies on it.
I sold my Nexus 7 for the nexus 9 when it came out but software issues have made me regret this alot. I would really like to come back to a 7 inch form and if it functions as amazing as my Nexus 6p, I'll be happy