In my opinion, here are the guns that need different re-balances.
-Hazardous (Remodel too. Make it the M1 Thompson, so it's different from the Typewriter series. Give it a unique mod or something. It's just a garbage Typewriter with a "special" skin. Perhaps the unique blue mod could be the box mag the M1 came with, 30 rounds but much faster reload time?)
-Anubis (I legitimately have not seen anyone say nice things about this. Also Id love a normal Armas-based WA2000)
-Reaper (There's a reason this thing is next to the Hazardous in MP price. Regular Scout is better in pretty much every single way.)
-Hitchhiker/JD. (Although JD is still useful point-blank. Never seen anyone use HH, like ever.)
-EOL Series - (This whole series has just been garbage from the beginning. The only useful one is the Kickback and even that becomes obsolete when you get the OPGL or Low Yield normal grenades.
-Not legendaries, but holy balls the entire Revelations pack needs a rework. The Misery, Strife, Oblivion, and Curse are all just awful.
(Although you can kinda-use the Strife. And the Misery is semi-usable fully-modded.) But seriously they should be way better than their current state.
MODERATE RE-BALANCE (STATS, MODS, ETC)
-Cap40 (Higher fire rate or higher normal damage, it seems pretty lackluster in any performance other than shooting through a dumpster or a glass wall.)
-Thumper (I guess it applies to all shotguns, but performance with all have been lacking. Constant issue so probably just the overall shotgun balance pass would fix it.)
-Ursus (Some people say it's damage is too high, or its not really a technical legendary. That'd probably be a finicky one and rely on usage stats.)
-Volcano (2 rockets? Skipping the impossible/improbable ballistics behind that, they do far too much damage per rocket. It should still kill in relative vicinity using 2 rockets, but they should only do like 50-60% damage, not the 80-90 per rocket it seems to do currently. That being the most obvious among other things I cant think of right now)
-Nano (Outclassed by other automatic sidearms. Cant tell you how many times I've killed someone who was using a Nano when I was using an NFA or a JD. I know G1 nerfed it post-release as with most things, but if I remember correctly it was also OP as hell when it released. Likely as G1 intended to boost sales before nerfing.)
-Firework Launcher (It just doesn't have a place since you can get the Flare Gun. Maybe make it have an extended detection range but less ammo? Not sure how one could really change this off the bat.)
-Duck (Its literally just a Scout with a Duck tagger. Gun skin itself is pretty awful too. Same issue as the Reaper overall, just not much of a place among other Armas weapons.)
-Thunder (Likely just another general shotgun issue. Haven't seen anyone use it in recent months.)
VERY LITTLE RE-BALANCE NEEDED, OR WEAPON SEEMS FINE AS IS.
-VBR Huntress (It's good all around. With IR3 it can do damage at mid-range easily, with CJ3 you can spam it in CQC and win relatively often as long as you get the first shot. Perhaps could extend the dropoff range a bit.)
-Ogre (It's speed makes up for the general shotgun issue, still performs well in close quarters. Perhaps when a shotgun buff comes, it might need a bit of a reduction, perhaps in pellet amount or something.)
GUNS THAT I DONT HAVE ENOUGH EXPERIENCE WITH TO DETERMINE
-Corsair (Heard this is pretty useless all around. Only seen a few people use it so far, with poor results.)
-FFA R&D III (I think I've only seen a couple people use this before. But there's a reason it's worth what, 15-20 million APB$, if not more? 3 mod slots on that must be pretty good combined with it's rarity.)
-Yukon (I know this got destroyed in the nerf it received. Only seen 1 person use it in the last 3 months and they switched after getting killed a few times in pistol matches.)
-Bloody Mary (Never seen anyone actually use it.)
-OSCP Series (I've heard that these are just awful.)
FEEL FREE TO DISCUSS. THESE ARE SIMPLY MY OPINIONS ON WHAT I'VE EXPERIENCED SO FAR.