I think it would be useful to see a screen with the status of all your builders, without having to search through your base to find out what they are working on and how long it will take to complete. From this screen you can see the summary, and purchase new builder huts. You should also be able cancel or gem to complete what they are working on from this screen, just like you can do from the map.
I thought of this because there is already a screen similar to this, but without any of the useful features. At the top of your screen there is a builder status show 0/5 or however many of your builders are available. When you click on it it takes you to a screen where it gives you the option to buy a new builder.
When you click here:
It takes you to this:
Instead we could have a useful screen more like this:
