So the old UI had a display showing your Crowns and Energy which was useful to a degree. I'm sure that people liked looking at their accumulation of crowns as they ventured through the Clockworks and so would I.
Can we have the Crowns/Energy Display back?
I think Cronus said a while back that there were no plans to revert back to the old UI, instead focusing development on other areas of the game.
As an addition, the old crowns-by-the-map function meant that rich people would be spammed trade offers on SK in a Bill-Gates-esque fashion.
Though I agree, a togglable CR/CE meter at the top would be nice. Also maybe a customizable slot where you could see how many tokens/materials/etc you were getting. Don't count on that happening any time soon, however.