One thought--lots of people are worried about money right now. Not just in the general sense, but about US money and currency. People want some stability now, some signs that everything is okay, that some things aren't changing. The "look" of the US currency is among the most recognized and iconic designs in the entire world. Given the current state of things, it would seem prudent for the Treasury to put all their ambitious "change for change's sake" programs on hold for awhile. Yes, incorporate subtle anti-counterfeiting features in the folding money, but don't drastically change the location or size of the portraits, change the color, etc.