Hi,

i think this calculation may be significant when playing normal mode,where you have to decide if a player has to be forced to play offensive (red arrow),
to play defensive (blue arrow) or can follow his own abilities,maintaining "normal" mode set by default.

If mode is set to defensive/high defensive by default, players will play defensive/high defensive unless flagged with red arrows.
Blue arrows should not be used,not to give domination to opponent.

If mode is set to offensive/high offensive by default, players will play offensive/high offensive unless flagged with blue arrows.
Red arrows should not be used,not to give chance of letal counterattack to opponents.

So it does not seem an absolute establishment on how your team may be offensive or defensive.