You have a giant tool tip open…
Obviously the UI is not usually taking up that much space. Are you wanting less readable tooltips and/or ones with less information? Frankly some of them need more information because they are missing basic things like stats.
The formatting of that tooltip makes it very easy to read at a glance. The aoe2 one is much, much worse in that regard.
They could have an option for advanced or basic tooltips, ones with very little information and ones with all the information.
They should reduce the size of the objectives it doesn’t need nearly that much space. The minimap though should really be bigger, it becomes too difficult to read.