Dathoria is based on the Tibia 8.0 experience, but not every deliberate gameplay decision is limited to features that existed on the exact 8.0 client date. Shared Experience is one of Dathoria's selected quality-of-life exceptions. It was not part of Tibia 8.0, and we state that openly.
We chose to implement it because classic team hunts can otherwise punish support roles: a Knight may spend the hunt blocking and a Druid may spend the hunt healing while the main damage dealer receives most of the experience. Shared Experience allows those players to progress together when they are all actively contributing.
At the same time, Dathoria intentionally avoids the later, more generous Shared Experience bonuses. The goal is to improve cooperative gameplay without changing the old-school progression philosophy.