Your list seems very preference-shaped, not pointing to actually-missing features I can see. You could make a case about discoverability, but it's hard to see how letter combinations that only work within one application and no others are easily memorized. If your habits mean you spend a lot of time working with files in a UI, then memorizing double-tap C and C+F might be easy for you. Otherwise, using the same Cmd+C and Opt+Cmd+C would have the benefit of doing what it does in nearly every other program. Or, as the other responder said, dragging auto-escapes appropriately.
I spend most of my time using a CLI, and I'm not claiming Finder is the best keyboard-driven file manager out there, but I will say that it's consistent, and works the way macOS works. Key combos work the way they work in every app, and holding down Opt updates the Edit menu to make it clear what would be different. You can do the most common things pretty easily and clearly, even if sometimes you have to use a mouse and right-click. There are also third-party apps for focused file management for pros, including some that use tuis, like ranger.