"Answers" mark 3.

[Catapult]

Recall though that Lahabrea was seen as a radical. The White Ascian disproved of his methods. Like most "movements" there are those who try to go through diplomacy and others who try to go through force.

That being said, Elidibus was reprimanded by his colleague for acting on his own and outside The Plan™. To at least one other Ascian, Elidibus is the radical.

Correct me if I'm wrong here, but the Land is Hydaelyn, correct?

Not quite. From what we can tell She is the spirit of aether in the land rather than the land itself. The world would exist without Her, but would probably not be able to habour conventional life.
I say probably, because it's clear there are things we don't know about Her yet.