Well the main thing I noticed was this update has seemingly gone smoothly, during an arena event no less. So well done on that front to the devs.
I have been getting hangs in the arena hub for some time and had another today after this update. Not sure if its been reported before or if a fix was meant to be part of this update or not.
It happens in the defense list where I go to do an revenge but when I press battle button nothing happens. I can still scroll through the list but I can't do any revenges. If I then try to go to the attack list, the arena hub screen just goes to the spinning logo endlessly. From there I am forced to restart the game. During an arena event its a pain...most of the time its just annoying.