I agree, give the LAW a support damage bonus since he's the only one that can really carry it anyway. smaller blast radius and larger epicenter damage for single target effectiveness would also be good, should take down a fp in 2 shots on hard, an alternative to AA12.
I also agree about cutting the M14 clip number drastically, at least by a third. The SCAR could also do with fewer clips, after all, we're talking about big a$$ bullets here, so you shouldn't be able to carry as many clips as you can with the AK (with the bullpup you get an extra 100 rounds). The main problem is the M14, I've never seen someone run out of EBR ammo despite getting tons of kills, it's just ridiculous.
Agree, the M32 could also do with a bit less ammo.
Agree, nerf xbow slightly so non-SS can't 1-shot scrakes and fps on Hard.
Agree, buff chainsaw.
Agree, let alt-fire be set to a different button (right-click) for melee weapons than guns.
Make alt-fire attack for katana and axe a penetration/multi-strike attack and/or create a new tier 3 zerk weapon with multi-strike.
Incendiary Handcanon ammo and/or flaregun that burns white-hot and does double flamethrower damage to single targets (scrakes, fps).
These would be excellent gameplay balancing updates, but for a major facelift-style update, create a Permanent Perk system where high-level perks grant you subtle boosts regardless of perk selected. This idea discussed
here (Suggestion 2). Easy to implement.
A more ambitious (but awesome) idea is increasing zerk movement and attack speed during zed time, making him move noticeably faster than the other players.
Also, give zerk a bigger movement speed and dmg resistance boost as his health drops, increasing his effective range and survivability.