I do think Blackburn has proven a swing and a miss as ST coach. They will have to do something about upgrading that. But also there is something to the fact that, being the youngest roster in the league, their special teams are pretty inexperienced. But they are also not all rookies either.
The core ST guys (based on snaps played) are Hummel, Skowronek, Rozeboom, Tomlinson, Reeder, Evans, Hoecht, Shelley, Johan Williams, Freeman, Lake and Trammell. Allen and Taylor to a growing extent given their increased playing time.