It probably comes down to one of two things:

1. Hrothgar are such a tiny, insignificant minority of players that they simply do not care/it's at the very bottom of the priority list. If every Hrothgar player left at once it'd be an insignificant hit to the game's health.
2. The game's underlying systems are so messed up and saddled with dysfunctional legacy code that adding a slight mesh alteration of a different headpeice is some herculean feat of a project for their developers.

Either is inexcusable after FIVE YEARS of Hrothgar being introduced honestly. The community babies the developers way too much.