Yep. they would think their coach had gone absolutely mad, so they would ignore him and play soccer.
Look, I know this game is by no means perfect.. but.. if you play a much much weaker team, you would expect to win.. That is what I think. You don't, o.k..
I would expect that zonal would work less well, actually.. because it relies on position. Man on man makes your guys try to cover theirs... again.. *my* opinion only.