Reaper GM Traits Are Weak.
I think they’re all pretty strong, its only that Blighter’s Boon was such a key component of the “main” build that people thought of when they thought Reaper, and it is really weak now except in 1v1s. Reaper was billed as a teamfighter that did well against lots of enemies, and Blighter’s Boon was required for that build to have enough sustain to work. This is especially true because those builds relied on Decimate Defenses to have enough damage to be relevant, because without that you’re a tanky build that does nothing but absorb damage, and other builds fill that roll way better.