Great idea. I loved playing it and I'm really a fan of automation in JRPG style games. This immediately made me think of a simplified gambit system from FF12.
The game would benefit from not having the UI reset between sims, as it would allow the player to tweak from previous state in the desired direction. Also as someone else said, a bit more information on what's actually going on during the sim would help make the correct decisions in each subsequent sim.