My alliance mate The Great Riz would like to apply he is also talking to support.
Humans are habitual animals, it will take time to get used to the new interface. It's all a bit different
If I open tabs with legacy and the new ui It's easier to know where and what you're fighting with or against with legacy, I don't plan on getting used to having to click every army to see what it has in it.
Make so it you can go to your messages with someone when you click on them and I don't get sent to the top of my messages every time I send a message.
Make your capital great again (bigger flag)
edit remove the flags added to the map next to armies and change them to the way it was in legacy if you want to know who controls the army you can click on it
edit 2 add barbwire to my allies borders if they are at war with someone or for everyone.
I find that I can do almost every easier in legacy than the new UI