What weapons need a buff/nerf and what should the buff/nerf be?
These are just a couple of the major ones that I think needs fixing.
Direct Hit needs a slight nerf somehow. The very fast rocket speed is a tremendous boon in the metagame; it throws off rocketdodging entirely, which was already what kept the Rocketman in check. If airshot minicrits really do work, I think base damage needs to be lowered slightly by something like 5 points.
Cow Mangler 5000 is a weird one because it almost always seems to do more damage than it should. I don't even know the damage details, but I think what bullets said is true:
Cow mangler does 75 dmg on hit, and burns away another 13.
This combined with its unique and exploitable reloads makes for a pretty OP weapon. Maybe just a base reload of 4 shots, while keeping all the partial reloads and charge-shot mechanics intact, would work.
Equalizer definitely needs a nerf. Again, lowered base damage might just do it. Lowering by 5 or even 10 might help. Damage ramp should still be intact, though.
Sticky Jumper is not really OP per se, but it is too often exploited very effectively. I don't know of any good ways you could counter this. Reducing the loadout from 12 to 10 or maybe increasing 0 damage to 5 damage or something might work.
Eyelander is also exploited very effectively too often. Again, base damage reduction of 5 might be effective.
Pomson 6000 and
Righteous Bison both need a damage buff or something else to make them better. As they currently stand, they're like weaker, more interesting pistols. The spy revealing of the Pomson isn't really all that effective in my experience. Maybe the reveal time should be extended.
Wrench is almost definitely OP. One easy way to nerf it would be to reduce the healing power of the wrench somehow. Healing less per nut-n-bolt might help. Much less.
Wrangler is pretty OP as well. Lower the amount of shots it fires from 100 to 75 or even 50. Or reduce its damage. Because that thing is a beast in chokepoints.
Enforcer probably needs a very low damage nerf or something. Just a little.
These are just from my observations, but I think they're pretty legitimate.