Basically arrows focus players more in attack or defense. Thats, like all things in this game, in a little % that really if we count all factors that affect a match I can not say how much is, but I have 2 blue arows in DC's + 8 reds, and for me is ok.
Lets say what?, 4-6% of benefit of 1 player in the whole season by giving him an arrow?.... because he will be mroe pending in defense and will save u just ...3,4,5 chances of recive a goal... so thats what I'm saying, a little effect style 4-6%...

Is my perception, and my viewpoint.