Gravemaker case: He use to be a very powerful tank in the past and his reign was over sometime ago. There are lots of ice and fire heroes that can beat Gravemaker.
Finley case: he is super cool and super stupid at the same time. He is very weak against counter attack and/or reflect. In the AW, I aim for him and bring along Mitusko+Elena Costume. Finley, Vela… don’t let Mitsuko or Elena (including all counter attack heroes) fire the skill, otherwise suicide is committed.
That is why Gravemaker and Finley did not get the nurf.