**Nerf Player-Stun Debuffs**
I'd include Webbed and Stoned but miraculously, Calamity already changes them; -15% movement speed per frame vs. vanilla's -100% movement speed and inability to use items for Webbed, and a local cooldown on Stoned and other hard stuns. I could also include Glacial State, but only Cryogen's Ice Bombs inflict it and it only stops movement, not items.
The remaining three all have their issues, and deserve changes. Frozen is incredibly punishing, and it being replaced in most scenarios with Glacial State would be net positive. At a bare minimum, Ice Bats and Spiked Ice Slimes should not be able to inflict it; they're so early game, the player will have next to no counterplay if they are unfortunate enough to actually be Frozen, and it just further discourages exploration of an already underwhelming biome.
Silenced is just a big middle finger to mages, and should not exist in its current form; having it make you be unable to crit for its duration instead would be a much more useful and less biased debuff, but frankly anything would be better than what it is now.
Cursed is easily the worst; its source is an incredibly common enemy that can phase through walls in a cramped space, and it removes your ability to use ALL ITEMS, including hooks, mounts, or healing potions. You can move, but it's a cold comfort in the Dungeon. This debuff causes an unnecessary focus on taking out Cursed Skulls, lest you get eviscerated because you were unlucky enough to be Cursed without a Nazar or its upgrades equipped. At a bare minimum, healing potions, hooks, and mounts should be taken off the list of things it can effect.
Generally, it would help to change how these debuffs work as above, or change their distribution to be more indicative of their power. (Especially removing the random chance from Brain of Cthulhu for Cursed and Silenced.) A general cooldown for soft stun debuffs similar to the one hard stuns have would also be nice.