heres another thing i REALLY hate ....
you know when you lose to the final boss and you already have everything upgraded? you still gain experience...the problem is theres nothing to DO wioth the extra experience.
my suggestion is to let us use our experience in battle....for like making your units more stronger...or being able to HEAL you units or like......maybe extend their hp bar or something? asnd the final boss was easy, except had too much hp o_____o