[Kanji_The_Wanderer]

No they aren't zombies at all. They are "Ganados" people who were once regular people, but they became controlled by a pre-historic parasite known as "Las Plagas". Coincidentally, the rulers of the castles, or "Castellans", have been able to control the Las Plagas since ancient times, such as Salazaar.

The Plagas mutates and the host loses all conscious, and turns into a mindless drone. When the host dies, the Plagas takes over full control of the body, thus seeming like a zombie.

But that's off topic, so what were people complaining about that Degeneration didn't have? You said people were saying "it's not this or that" care to explain more?