Omeed Dariani left the EverQuest Next team suddenly, there was no small amount of curiosity and speculation over his reasoning. Obviously he knew something that fans didn't, but what was it? He recently appeared on Reddit to briefly explain his departure, stating that it was the result of an ideological difference that could not be corrected. Dariani states that his immediate supervisors did not support the community-first structures that have been established for both Landmark and EverQuest Next, so he ultimately felt that he had no options beyond resigning in protest.
No personal issues were involved, contrary to some fan speculation, and Dariani was quite clear that his departure was entirely voluntary and he was in no way given an ultimatum. He maintains that he has the utmost respect for the teams still working on the games and that neither of them caused his departure. It might not be the happy news of another job just waiting in the wings that fans would like, but it at least explains why he left.