A. Your point about adding chairs and players is worth commenting on because it does indeed affect the equation. The problem is that more players are added than chairs. Unless the boys entering shidduchim marry girls who were already in shidduchim (IOW, older girls), it won’t help the disparity.
C. Then the others won’t get married. Different players finding seats, same number left out. I’m disappointed; I think I could have come up with something better than that.