Well a few days after the update and I'm starting to run into the same issues as before. The start screen needs to load after unlocking the phone. The start screen also would sometimes lock up when I try to open an app, forcing me to lock/unlock my phone before the app would open.
A new issue I've run into is not being able to close apps. Happened a few time last night alone. Would slide the card down to close the app, just for the same app to appear on the screen. The back button became unresponsive during these times. One instance, I had multiple apps open, tried to close them but the cards just came in a loop where I closed the same three cards three times before giving up and finally restarting my phone. All has been well since the restart last night, but it's still disappointing to see the performance issues have not been resolved.