Quite frequently, after a new update, it is necessary to do a FDR (from the Recovery Menu). I would love to know what causes it to be necessary in some instances and not in others, but with all the variables in play we will probably never know. Gremlins I guess. Anyway, back up data that you don't want to lose and make note of what you have installed and do an FDR (from the Recovery Menu). The Play Store should reinstall most all of your apps, but sometimes it misses some. Most of the time, with my set up, it misses those apps that require keys to operate. It will restore the key, but not the app and I have to go reinstall those manually.
To do the FDR from the Recovery Menu:
Power off the device.
Press and hold Volume Up and the Home Key.
Press and hold the Power Button.
When the device vibrates, release the Power Key.
When you get the small blue writing at the top of the screen, you can release the other buttons.
Use the Volume Up/Down buttons to navigate the menus and use the Power Button to select menu items.
I recommend doing "wipe data/factory reset" three times and doing "wipe cache partition" three times (I have heard this from devs in the past, I don't know what is magic about three times.)
After doing all that, select "reboot system now".
After the phone has rebooted, leave the phone alone for about 15 minutes and then wake it up and start setting it back up.
Non of the above is any of my own concoction, I have just read stuff from various devs that say that the three times and the waiting 15 minutes is beneficial.
Good Luck,
BigRedGonzo