All games since July considered, USF not even 3.5% off of 50%. I wouldn't call that abysemal but well...
To the point: I assume since USF performs well in 1v1 and 2v2, a buff should alsp come with a nerf. There will be more M20s in 1v1, on the other hand the major will also be used more often at the front line and not as an FRP. Plus, munis are not as scarce in team games, allowing more recon overflights. As you said, a rather minor buff but (without testing) I'd say it should probably come with a minor nerf too
On 1v1 and 2vs2 the top company at loadout is Airborne. I assume it will be picked quite often. Its my favorite USF commander too across all game modes.
Major sight buff gives absolutely nothing to Airborne since Pathfinders will be always way better for that task (same for Recon but that one gets way less picked).
To be honest: I don't think major buff will be anyhow visible in stats more than 0,1% to 0,2%