I want to say balance, but it's a different kind of balance to public play. The other kind of balance is regular balance and must be symmetrical if not A/D.
It's a balance for 6 vs 6.
Symmetrical for absolute balance.
It needs good roll out (high, clipped ceilings).
Doors are annoying.
Environmental deaths are annoying.
Water is annoying.
A Boojum Snark: Don't listen to grazr he is probably drunk