the graphics in my opinion look clunky and basic
I agree the graphics need work. This is high on my list and I hope to improve them soon.
the maps have become harder to use
Can you describe what's harder to use about them?
What was wrong with the orginal UI?
You're talking about the old iPhone app? The big issue was that it was a separate codebase from the web version, which meant that it was missing a ton of features and made it buggy and time consuming to maintain. I had people complaining about it every day and it had a very poor rating on the app store.
thr game played so badly on Iphone.
Please report it at https://www.warzone.com/ReportBug
and tell me what iPhone model you're playing on, and in what way it played badly (slow to load the app? slow to load the game? glitchy? etc)