Generally a cool concept, much like the series "Battle Bots" where the robots are built in a certain meta strategy and fight.
One thing I will say is this is less of a game and more of a simulation. Still entertaining, but there is not much in the way of substance that makes it "playable" besides the choice you make at the beginning of each phase. I still do find this kind of fun, like betting on a horse, but that's pretty much all this boils down to I'm afraid.
Would be very interesting to do some sort of genetic algorithm test on this though to find optimal builds