Hydroid and Nyx seem to have remained in Conclave after their rework unintentional.
In Hydroid's case, his 4 doesn't do much as it doesn't seem to be able to interact with players whereas his 2 is able to occasionally hit someone multiple times resulting in absurd damage, capable of one shotting even the currently inflated player HP.
In Nyx's case, she retained her Mind Control's damage multiplier and teleporting ability, the latter being very problematic as it allows the Nyx to teleport a player into a spot where they are permanently stuck and unable to play (in addition to just the overall cheesiness of freely teleporting someone into something like a Tigris shot or Simulor vortex with no possible counterplay).
PS: Untelated but on the topic of unintended behaviour, Fragor Prime heavy slams seem to be dealing 500+ damage due to combo multiplier carrying over to Conclave, Tonfa slide attacks have ridiculous multipliers exclusively when unstanced and the PvP damage multiplier straight up doesn't work on the Dark Sword Duals.