You make good points. The FCC will do nothing, from personal experience they have way bigger fish to fry.Now, the NFL does carry clout, but again their is little to any damage done here. Aside from the personal embarrassment of a franchise(s). The bigger things going on like corporate hacking, defense hacking, barely register on the FCC scale.
The NFL can hope to get their well payed counsel and drag it into the court system, fighting Deadspin who obviously understands the rules both before the tape release and now will take awhile. This other than the two teams fanboards in a story that will disappear in hours.