Well, if history holds true, D'Hara will starve themselves down to your level before too long.
Although, who knows. Maybe the new estate system will let them break their track record.
Regaining Nebel, Qulbel, and Qubel Lighthouse truly will help. This is partly thanks to the new estates. Most importantly, however, will be the new estates' effect on Barca, as they are producing more and more food, and we'll be able to rely on them a lot more to feed us, as opposed to the greedy Madinians nobody likes anyways.