i think having some kind of tool tip when you hover over a UI element that displays the shortcuts related to its use could be very helpful, i have working in Maya for a while now and one of the few things that i really lie is that functionality. (i have left a example in image below)
One thing that i remember from being a new player in KSP 1 was slowly finding out all the short cuts, i believe having something like this could be a non intrusive way of teaching newer players all the shortcuts and make the UI more navigable.
something like this but with our the text discription
