So I have posted a few bugs when I was on the Stardock forum. Here's what I had to say.
Firefox could use a Stardock extension to work around the lack of theming in the program
SumatraPDF is glitched
Adobe Reader ignores styles
LibreOffice has issues unless HW acceleration is disabled
Theme Manager and Iconpackager have problems, specifically Iconpackager failing to revert default icons
DeskScapes stay paused when changing desktops from a maximized window
Vitalsource Bookshelf loses it's control bar when maximized
So it's still beta, but overall, it is a nice product which is a major improvement over the ugly windows 10 black and white color scheme.
Edit: New glitch found in the control panel, look for text on the left of the control panel.