Simply put, ctl+alt+G for gain change, ctl+alt+R for remove track..... anything that is 3 menu levels deep, it would be nice it have a hot key for.

Examples of what I would do if I could create user defined hot keys. I would guys that each user has a short list of the things they do most, as well as a list of things that they maybe didn't even know where there (that'd be me - I find out new stuff every day, as I have never delved deeper than what I need to get a job done.).