The new UI is very hard to play in!
Everything looks the same color.
Icons are small.
I can't understand borders.
I can't understand if my armies are stopped or moving.
I can't understand if my armies are in a city or in a road.
I can't understand where my armies and enemy armies are moving from/to.
The legacy mode has way more contrast and everything is easier to see.
The only thing good about the new UI are the technology used and the interface options' placement. Everything else: color, contrast, size, positioning, mechanics, is way worse!