I'm sure a lot of people know this. Certainly many people know that Acheron is currently the best sword in the game. Cautery Sword is the only Brandish that is not overpowered, and that's because someone saw it fit to put it on par with the Cold Iron Vanquisher.
Anyway, the point is, if the Combuster and similar are weaker than the Acheron because they have a status, then why are they more or less on par with the Leviathan Blade?
(Note, all damage values are considered at Depth 25, in neutral damage with no bonuses)
According to the calculator I used (linked to at bottom of post), the Combuster does 492 neutral damage on its first two swings, and Levi's first two swings do 335 neutral damage. Acheron does 530 on its first two swings, the same amount of damage the Gran Faust does on its first swing. These values are not very balanced at all. This obviously gives two choices:
1. Buff the Levi. Blade to match Acheron, buff the Amputator, CIV, FoV and any other similar swords to match the elemental brandishes, and adjust the Gran Faust (and D. Avenger as well as anything else that would need changes to be viable) so that they aren't outclassed by faster swords.
2. Nerf the Brandishes to fall in line with Levi. Blade line in terms of base damage.
There are other cases of unbalanced weapons/armour in Spiral Knights which obviously should be also addressed as well. Perfect balance isn't really possible but there are definitely many items in the game that are either incredibly overpowered or incredibly underpowered.
Once again, I know that many people are aware of this issue, but I'd like to bring attention to it. I used this to compile comparison for all damage numbers as measured, and the numbers recorded on the wiki also support this.
Your link "this" is broken. It doesn't seem to point anywhere.