One thing I've noticed after the update is that volume automation in touch mode now behaves as if it was in latch mode. Weird and annoying. I use a PreSonuns FaderPort for volume automation.
It seems that others are experiencing this bug: https://discussions.apple.com/thread/7489612
The delays are all messed up if you created the settings in 10.2.
I am using logic tape delay, and after the upgrade, logic decided to apply a feedback percentage of 355%
Also notice issues with Delay designer.
The look and feel and parameters of many of the effects have changed.