I know the display has been reported a lot due to EM shielding issues. However, I think my unit has been working fine.
I've noticed that whenever I'm using the 5k display (in clamshell mode), Astropad would slow the whole system down quite significantly. You can see the mouse cursor frame rate dropping noticeably, and the lag on ipad is almost unbearable.
When I'm only using the built-in retina display, everything works fine.
I wonder if it's a hardware limitation where the AMD Radeon Pro 460 just can't push that many pixels while running Astropad? Or is it a software optimization issue? I surely hope it's the latter..