Click lag + program slowness

The new UX versions of animate CC are causing bad click-lag / window-lag. 

Examples of the problem:

- When I click on a symbol, there is a small delay before the symbol gets "selected"

- When I drag the size of the timeline window, the "dragging" happens at like 2 FPS.

- Dragging symbols around the screen, the symbols move at 2 FPS.

I'm on a Mac Pro and I use an LG 4k screen as my primary screen.  I've noticed that if I make the application window as tiny as possible, these slowness problems get much better.

Any advice?  This slowness problem is causing big workflow issues for me - feels like I'm working through molasses.  

Thanks,