No it does absolutely not. I can already guarantee you that if pathfinders are broken in 1v1, then it's because of the map control they give you. A factor that is almost irrelevant in 2v2+ and especially on a tight map where it's about frontal assaults and manstop-power
Um no, this doesn't really make sense. Of course the context, 1v1, 2v2, 3v3 etc matters a lot... But its perfectly possible for something to be objectively unbalanced, regardless of the game mode.
(Not saying I agree or disagree about them being broken btw, just talking about the principle)