Thanks for the detailed reply.

If, at 5'10, I am experiencing problems related to desk height, I can only imagine problems are worse for those shorter. I wonder if there is a correlation between height and these kind of problems. Standard desk height seems to be designed for someone who is 6'2.

I was considering adding a keyboard tray, but I'm thinking that I mostly use my desk for a keyboard and mouse, I might as well optimize the desk for that use rather than having an add-on for that purpose.