If we can take the way they re-worked Sky to be an example, I don't foresee future adjustments of Salvage/Einherjar/Assaults/etc. having any long-term impact on the price of Alexandrite.
Each HQ Abjuration has one good stat that's worth Augmenting for, but it's not *so* worth augmenting for that there are more than 6 people in Sky right now. People shredded the Abjurations they had sitting around and now no one cares enough to go farm Sky so they can get a 5% Fast Cast
Blood Cuisses instead of a 4% Fast Cast one.