[FIXED] Comments - Shift + C hides, but I need capital C's!

This is strange, Shift-C as a shortcut only works for me when I’m not typing. Tested on both Mac app and Safari. What system are you using?

But in general I agree with you. Using Shift for shortcuts is not particularly good idea. I would rather reassign all of them to Cmd (Control). So having ability to customize shortcuts is what is needed: