I'd agree with lowering base movement speed and ammo.
movement speed to like 90%, just below demo's 93%. base ammo to 15
sniper rifles should always have tracers on firing. I half expected this to be done after the classic was added with a decent looking tracer effect. The classic's should be punishing enough within competitive circles. The machina's is overkill unless we're considering pubbers
Lowering bodyshot damage like the hitman's heatmaker is fine imo. only really affects medics walking in fully charged snipers' sightlines though. Which is a skill issue, not a sniper issue