The discussion highlights two points. Frist, the trend in the study of policy networks to ethnographic methods mirrors general trends in political science.
Fenno observed, "not enough political scientists are presently engaged in observation." That was then. Now there is a growing interest in the interpretative turn in political science. Any discussion of this turn would take us too far afield. However, it is worth noting that the origins of network analysis lie in social anthropology, which examines who talks to whom about what in (say) a Norwegian village. So this point is perhaps best expressed as an overdue return to roots.