Energy Cost Reduction for Completed Battles in Missions

[Intanjible]

After completing missions in a chapter, the energy cost to repeat the battles in those missions should be reduced based on the number of stars accrued in that particular mission. For example, if it initially costs ten energy to finish battles in a mission, after one star is gained, the cost is brought down to nine energy per battle in that chapter's mission. When a two star rating is achieved, the cost is diminished to eight energy for each battle in the mission, and so forth. Even if the formula isn't applied as I've outlined it, it still seems absurd to still have to pay full energy cost after battles in a mission are completed. Also, it would be nice if after a new mission were completed for the first time if your energy were restored.