I loved Behemoths passive for being a sort of automatic balance when the Hunters outperform the Monster. However, I do not feel it is enough to achieve a balance yet. Still too strong against pub Hunters, still too weak against pro Hunters.
I dislike Wraiths passive for making winning easier the more the Monster outperforms the Hunter.
This is why I would like it if per stack there would be more effects than just one.
For Behemoth things like Climb speed and/ or Movement speed might be added to his damage reduction, so that he is not kited as easily (maybe even a resistence to CC, making CC less effective the more damage Bob suffers).
For Wraith, whose passive emphasizes the Assasine niche, I’d like to see a passive effect, that gets better the better the Hunters deal with the damage boost. For example: When 5 damage stacks from Isolation are unleashed against a Hunter, yet no strike is gained within the next (fill in the blank) seconds, Wraith gains 5 stacks to traversal regeneration, so that she can retreat and try another ambush.