Digging through menus can be pretty frustrating. A way to search available commands and options would be ideal. Something like Emacs's M-x prompt suggesting commands as you type, and if you see nothing relevant you can try a different term. Even the basic actions the default keybinds do have equivalent commands you can run.

I've heard of a setup relying on Unity's old global menu feature that then lets you use something like rofi to search all the menus in a GUI program at once, but sadly never got it working. Sounds like a dream. You didn't have to actually use Unity, just make programs think you were, presumably so they'd expose the information the right way.