From what I have found no increasing have been made to the amount of DNA received for leveling sanctuaries. The amount of coordination and constant badgering in a limited chat window just to get my clan a level 8 sanctuary is exhausting. The reward is almost unnoticeable unless you actually take notes on the increases.
Why not increase these benefits? Perhaps it is easy for other clans to get to high level sanctuaries, but from my experience achieving this is quite a feat. Reward this dedication or just get rid of the leveling system…what’s the point?