When I was presented with the retreat line, I thought "this is such a great idea!" So I was expecting being able to push the enemy units, or make them flee under certains conditions, etc. But I wasn't able to use this once in the whole game, even though I played until the boss fight - which I lost be being severely outnumbered by the way, as being attacked reduce my endurance!
I think this game is well executed and has some great ideas, but it needs to be refined a bit more.