va[fun_][g_] := AssociationThread[VertexList[g], fun[g]]
. One would use it as vs[BetweennessCentrality][graph]
. Then it returns the betweenness values directly associated with each vertex. Trivial? Yes. But I happen to use this all the time, and I'm convinced that it's worth packaging it up. I don't want to add this to the beginning of every notebook...