Round 1 weapon balance data for any statistics nuts:
Pistol: 7,428 damage / 121 lives (61.3884 dpl)
Shotgun: 5,148 damage / 58 lives (88.7586 dpl)
Assault Rifle: 4,020 damage / 39 lives (103.077 dpl)
Flamethrower: 3,840 damage / 33 lives (116.364 dpl)
Stalker Knife: 9,125 damage / 180 lives (50.6944 dpl)
Momentum Knife: 984.293 damage / 8 lives (123.037 dpl)
Serrated Knife: 2,228 damage / 24 lives (92.8333 dpl)
Bloodlust Knife: 5,355 damage / 68 lives (78.75 dpl) (Note that this was while the knife was [intentionally] broken)
Shadow Knife: 3,442.5 damage / 37 lives (93.0405 dpl)
The pistol and stalker knife are both abnormally low so I suspect this has something to do with their being default, and so they haven't been adjusted.
Adjustments made:
The bloodlust knife was restored to functionality (15% growth). (buff)
The momentum knife's speed scaling was reduced from 2 to 1.5. (nerf)
All flamethrower damage was reduced by 25%. (nerf)
The assault rifle's damage was reduced from 10 to 8. (nerf)
The shotgun's damage was reduced from 8 to 7 damage per bullet. (nerf)