So it shows everything you have on your base that you can still upgrade. Say if your on th 8 and you have level 7 archer it will show how much it coststo upgrade and to the next level and it will keep showing it until you can't upgrade anything more with that th your on.
Instead of clicking on every defence and objects in your base to find something that needs upgrading it would show am everything you can afford to upgrade and things that need upgrading.
Yes I know. This is my first suggestion. So I'm sorry.