I don't think that most Crack Van recs for Highlander are drawn from recent stories. A lot of the whining about "everything's already been recced" seems to come from people who aren't reading what's being written now. Reccers seem far more inclined to root around in old archives to find stories they remembered or previously unrecced writers.
I think it's more likely that people are bored or disengaged from the fandom as a fandom and aren't inclined to get involved. Again, I keep seeing the crossover craze as a deterioration of interest, not an infusion of new life.