From the quantum standpoint, the situation of galactic spin rate profiles is suggestive to me of a sort of galactic-scaled quantum coherence. This suggests that information and energy generated by the galaxy in the past is being contained and recycled within the galaxy.
From the cosmological standpoint, I can't help wondering if energetically spinning black holes don't have a role in the picture, as the phyics of such objects is not completely understood. My guess is that information is not lost into black holes, but is instead carried "out of the plane" and into extended regions.
Shaky ground indeed.