Maybe if the U.S. Treasury simply left the money alone the issue would resolve itself. I've known blind persons who knew all currency strictly by feel of the texture alone. My wifes step mom was a bank teller. She could count her till and never even look at it and talk at the same time. She counted by the feel even though she could see it. Feel counting was faster and with her accurate.
I can see and I can't keep up with the coin changes now much less the bills. There is no reason for this except to perhaps get us more used to a common Trade Union Currency perhaps like the Euro is?