After installing Parallel 15 using a Kali 2019.2 guest - the video is locked in at very specific DPI (much less than the monitor supports, and much less than was available in Parallels 14). If I install Parallel Tools 15 on Kali, it breaks the virtual machine completely. See two screen shots..
Parallels 15 - video driver no longer showing supported resolution.

Parallels 15 toolbox install breaks the image - the display is so large (image below is not zoomed), I cannot change the settings, or even get to the part of the screen to see if there are any other options (e.g. cannot resize at all).

Kali uname -r

Parallels 15 - video driver no longer showing supported resolution.

Parallels 15 toolbox install breaks the image - the display is so large (image below is not zoomed), I cannot change the settings, or even get to the part of the screen to see if there are any other options (e.g. cannot resize at all).

Kali uname -r