When assigning mouse buttons, it would be good to have a Group, so that I could easily assign the same actions to related apps. For example, I want a Browser group so that Edge, Chrome & Brave all get the same settings.

I have some software where I need to have several versions of an .exe, and I want the settings to apply whether I'm using version 20 or 33.

If I had a group of media player apps, I could assign play/pause or volume easily.

Which reminds me, the other direction would be to allow custom settings for websites, so that I can control how the mouse works on youtube.com or netflix.com whichever browser I use.