Therefor I'm adding the suggestions to this To Do forum so that it's an official suggestion rather than just discussion.
To sum up, it's an a shortcut to change colors/channels more quickly in the piano roll, applying that functionality to note selection, then a 'live' application of that functionality.1. [alt] + [c]+ [#] allows you to change the color you're working with to channels/colors 1-8 automatically (Ex: Alt+C+6 = Dark Purple) (first 8/16 options)
2. If a note is selected, the above method in Q#1 will also change the selected note's color also. Then you can just use Alt+C to continue in the same color.
3. I know this is a stretch, but lastly I suggest the ability to also use the method of Q#1 in live recording, and apply the current color to the whole channel's piano roll. The idea is that, if, for example, I write one horn line in one articulation, I can slow down the tempo a bit, go back to the beginning, press record or play and change articulations as I hear them coming by color. This gives you the workflow benefits of key-switching without the problems and also extends this workflow to Patcher. Maybe this could be accessible in the Piano Roll's toolbar (along with 'record' or simply the 'play' button?).