Huntsman is extremely strong, at the very least i don’t have any problems with that career.
That being said, the career skill could use a lower CD.
Elf is not OP but the elf is “newbie friendly”.
In more Legend or Cata difficulty i see more elfs go down than Huntsmen, just an observation from 1k playtime 
Outcast engineer is not garbage, this career is very situational though.
The thing about this career is that it is made to stay at range, but this game does not allow that to happen easily. Friendly fire, map designs, rear spawns, dense hordes, special enemies and so on… all contribute to the fact that staying at range is more difficult than simply going into melee combat (which this career is lackluster at compared to the other careers).
2H sword does not need a buff, absolutely not.
It is extremely strong where it needs to be (unarmoured targets) and weak where it is supposed to be (armoured targets).
I’ve used builds where the 2H sword has caused me to unintentionally commit a rat genocide.
It is a “brain dead” hack and slash weapon, but it can only get you so far untill you face a mixed horde and your cleave is stopped in the chest of a chad chaos warror who is not amused.
Pair it up with a ranged weapon that defeats armour and you’ll have a good time playing with it, just make sure to remember to prioritice targets and swap weapons depending on the target.
Viktor is a gargantuan chad (heck yeah).
The only thing i can actually get behind is Sienna’s Cowbill melee weapon.
I have been able to make use of every single weapon with every single combination of builds across all careers and build varieties. But i can’t make the Cowbill work unless i avoid using it at all.
All weapons have at least one swing that can be used to block-cancel your way to handle every situation to some degree. Or at least have breakpoints that makes the weapon sufficient in any situation that is the focal point of the weapons specks and you put on it together with charms and skills.
A good example of this would be mr Salts OH Axe, it can be used extremely well if you know the attack patterns. But Siennas Cowbill does not seem to be able to handle anything except Chaoswarriors. But even then, you might aswell use the Flame Sword that goes together with your build much better and is inline with Siennas “thing” to burn things.
The Cowbill needs at least one sweep attack in its swing patterns, i would vouch for the 2ndary heavy attack.
Goat people are iffy, but i don’t think they need a nerf.
This game needs to be challanging and the Goatsmen is a good mean to challange players.
They aren’t broken, all goatsmen have their nieche and can be countered easily if youre aware and know how to dodge and strike.
Imo, balancing discussions need “meat to grind”, as in facts to digest and grind down to their core values. Asking for balancing without referring to other posts, videos or imperically based arguments will most likely not get Fatshark to bring out the wallet for the devs to chew on for something to change or fix 