Please confirm what specific apps that are running slow after the update.
Are you using Wifi or LTE data?
Which apps give error that program is not responding?
I would like a similar answer for my Ellipsis. Horrificly slow to respond. Worst are the 3 main soft keys and the swipe downs from the top of the screen. Changing wifi settings took me over 4 minutes. Google hangouts was unusable. Websites are taking 10-20 seconds to load.....this is a really bad update. Something is really really wrong with the touch screen response. The virtual keyboard takes ages to pop up too.
So minutes after typing this my tablet rebooted itself and appears better....I had been rebooting it a lot so really puzzled now, but also pleased