In your hypothetical scenario more then likely every gun would be able to ohk body already. Unlimited ammo would be its "broken perk". That's when you come up with perks like tracking ricochet rounds that can ohk to the body but take charge time to fire to counteract unlimited ammo and add in weapon diversity. Anywho back to reality. Nf/luna were already pretty balanced. They were high risk high reward. Ace is leagues better. People don't use ace though because of bloom. If bloom was simply removed that would've drastically opened up the meta. But buffs are apparently hard.