I think that the Riflemans don't need any buff right now.
Such test quite irrelevant, i never saw such situations when both sides sitting in green cover and start shooting at one time. One side always in green cover while other need time to reach it and take damage from defending enemy.
Better make situation (the most realistic scenario in-game) when both squads need to go to green cover and fighting in process. Squad with less penalty to movement accuracy or with more firepower (like double bars) will be in favor.