Yes she is, even by the game standard of having unique set.
So the Dev have to nerf her, directly and indirectly, after she basically faceroll people in a battle royale event (tank everything, poison any fool who get close)
Directly - her skills get nerfed (forgot the specific)
Indirectly - classes get some type of defense piercing attacks, so stacking def to laugh it off is no longer possible (especially with her 0 agi's waddle pace)