It's of course very hard to sort out what's talent and what's coaching, but my best guess for the recent effectiveness of the coaching is:
Placekicking -- very good
Rest of the FG unit -- so-so (those early-season blocks)
Punting -- good or better than that
Punt coverage -- good not great
Kickoff coverage -- good not great
FG defense -- hard to judge; I suspect results are overwhelmingly a matter of talent/execution/luck (and what Seymour's health and motor are like that week)
Kick returns -- very good -- Faulk, Bethel, and Maroney all put up stellar results at various points
Punt returns/defense -- hard to judge, but probably pretty good
Overall, a good job, but one that can be improved upon.