Hey,
The report ID is 287954250
Here is the best way I can describe the lag issue:
Tablet:
https://www.dropbox.com/s/3d6pxovyja9scx3/scroll-tablet.mov?dl=0 - click and start dragging the scrollbar. Nothing happens until the pen moved a certain distance, and after that scrollbar "jumps". Note: the scrollbar is just for demonstration, this happens with every tap-and-drag action
Touchpad:
https://www.dropbox.com/s/indx7i74zv0i1l9/scroll-touchpad.mov?dl=0 - click and start dragging the scrollbar - the scrollbar moves immediately with the cursor. Feels smooth.
This did not happen in PD13, so it feels like the new tablet support had messed up the experience.