Base Offense and Defense Balance Indicator
It seems with the latest update, having a balanced offense and defense will be crucial for having the best war match ups.
Right now it's impossible to know how balanced your base is offensively vs. defensively.
I suggest adding an indicator like a slider that rates your current offense/defense balance. When you go to upgrade a building or research a new troop, you can see how it will affect your balance before starting. It will move to the left or right and the closer it is to the center the more balanced your offense/defense weight will be.
This will also help players determine what is a good pace to research troops vs. upgrade defense.