yeah to use it you just weigh up how good each individual units attack values are so you know what to charge into the enemy with, find the biggest defence valua and use that if you need to defend a key choke point (castle gate bridge etc) morale for knowing the uber unit aint gonna break and run on impact , armour so you know which to use to bait the archers fire so they run out of ammo ,

theres a lot of useful infomation on that screen and when you know how to interpret it it can be a battle winner