Notifiation center is also struggling, tried hard reset and re-start, its not smooth... :-\
No UI issues on beta 7 for me, everything in the UI kit is smooth as can be. Swiping screens, swiping down notification centre, opening multitasking tray with full page of apps, opening full folders, everything is smooth.
I never do OTA updates, I prefer to get the ipsw file and do a DFU restore, but I don't know how you upgraded.
Looks like i need to do the same then, need to do a full restore and not OTA.
will do that on the weekend and lets hope its better ...
will ipsw files be done away with in favour of OTA delta updates?