Here are several things. Although I know that this is pretty much like about 2years already, I like to file it as bug/error because it's heavily anoying.
1. If you play on a resolution less then 1920px width, the fucking advertisements spam is taking up to about 1/3 of the available screen width if browser window is maximized.
2. If you use the province overview and select a province, it always centers the whole screen under the overview menu. So you never see where the selected province really is located. In the above examples, I selected Al-Kufra. The menus do completly overlay that province on the map. If you want to see the province (which is sometimes important) to f.e. judge on if you really want to build something there, you need to move the map on the tiny little space left of the menu to make the province appear.
The issues are same in both UIs, legacy & new-thing.
Those screenshots were taken on a resolution with 1366px width.
Please fix this. My proposal is to determine the space between the left border of the province overview-panel and the left border of the browser window and center the map view there.