If you are facing any major issues with the beta, just back up your data on pc using Smart Switch (So that everything goes back exactly as it was after restore) and do a factory reset... Lot of things will fix themselves...
After the initial update, Gesture navigation was super laggy.
Camera wasn't the working the way its supposed to (Was not able to focus properly, super slowmo and slowmo gave almost same results)
App screen animation was not smooth.
Device was heating a lot. I don't use case so I could feel the heat so much that the device couldn't be held for long.
Battery also sucked, device dropped down to 50 from 100 in just 1.5 hours.
And a few more issues I was facing. I did a factory reset and most of the things are working fine now...