I find that I am of the same idea, the new HUD and store just feel clunky. They are very heavy and slow, don't even bother pressing tab to see the other teams items its so thick and heavy you cant see behind it and its annoying to look at. The shop feels much slower to navigate, if they want to make the shop easier for people they should have left it the way it was and just allowed you to set your own recommended items at the beginning of the game if you wanted, then i could find them quickly as i went along. I find that clicking in this shop just doesn't work as well and having so many options on the left hand side makes the shop far to big. Aside from that the top right has gotten extremely ugly it makes me so sad to look up there to see my score whether its good or not.
Overall I feel like i was watching a new episode of Pokemon and it was stopped in the middle and the Flintstones came on. I want my Pokemon back yo. I don't mind jungle changes or item changes that's fine, but why go and change a perfectly good attractive interface and make it so god damn ugly...