Doomcrab was weak ever since the nerf. A lot of players, including myself, wanted this nerf, specific to its damage output, because this boss kept devastating human team and barricade compositions to the point that there wasn't any point in trying to build a cade because we would be killed from the inside-out by this boss. Additionally, this boss had insane AoE damage potential that made it overpowered because it was capable of killing multiple humans in quick succession.
Personally, it deserved the nerf. As a human, I was tired of building a well-established barricade, only to have it fall apart because people from the inside would die, many of them at once, even when they weren't hugging the cade.
However, instead of boosting its damage, why not add an extra debuff to this boss' attack that would be inaccessible otherwise?