I don't fight, I'm pretty neutral. Nothing is 'on my list' because my login character is magick on a technicality.
Your Sulfonal argument only works if there is nothing higher priority meant to be cured - your proposed solution is Sophie's choice. They either let numbness progress and asthma stack, or get those afflictions again when Sulfonal relapses them. It is a badly balanced team combat affliction, and the proposed change has no impact on 1v1 combat.
It needs to change. The ONLY two changes that I support to nerf Assassin/Renegade are changes to Instill and Sulfonal - everything else is justified.
Isn't that the issue with bard that you dismissed? You said "Bard is not a scary affliction class, they are a class that stacks otherwise low priority afflictions into damage." You are describing assassins damage in the same way as a problem but dismissing a similar problem with bard.
I'd disagree with the statement of bards not being a scary aff class, the affs you listed are quite good hinder, anti cure and extra damage.
The difference is that a bard will be focusing these useful affs while building to their high damage attack. An assassin will be focusing their damage while not really building to much else.
The assassins damage you could more compare to Shamans high damage output with curse, healthleech and choke.
I do find it odd that Shamans as an aff class can output a higher damage output than a lot of "damage" classes despite as Galt puts it shamans being a superb duellist class. With amazing group utility even if you took away their damage.