Changing the timing of faust effects all game modes
Correct, but it's being talked about being changed for the benefit of 1v1 players, not for the benefit of team-game players (and the detriment of 1v1 players).
Also: Teamgames may be "popular", but they are not representative of high level play (As 1v1 is), and so are not anywhere near as relevant as 1v1, and balance should not be governed by teamgame efficacy if it would negatively impact 1v1s.