Make the Obsidian Crown disable all healing

[Sundance]

If there's one thing the cloaked taught us, it's that having someone running around 99% invincible except for one specific so-called "hard counter" (that doesn't actually counter the thing but just lets you fight the owner on semi-even terms) is shitty and miserable. Removing the crown's chem immunity completely is unlikely to help much, since the wielder will then be able to use healing chems.

I agree with this form of thinking, but there are major difference between the hard counter of the cloak and the proposed chemical prone crown wearer is that just because you can see a player, doesn't mean you can robust him. You're just now on equal terms, only it's not that equal as nobody else can see the cloaker bar you.
If you have chemicals (whether it be in a flame-thrower, beaker, spray or a tranq gun) then you're a little bit more than equal if you manage to get the chems on them, because the player is not only visible, but the big black lovecraftian crown is basically saying "TARGET THIS GUY"

So yeah, in short there is a difference.