The Seattle Seahawks finished 14-3 and with the top seed in the NFC playoffs despite the fact that the team only had one wide receiver who could consistently produce. Jaxon Smith-Njigba, after all, had 1,200 more receiving yards than any of his teammates, and that isn't sustainable.
Seattle will have a decision to make on wideout Rashid Shaheed, and the team should re-sign him, but his production as a wide receiver will be hit-and-miss. He is an elite kick and punt returner, and that is where his real value lies.
Seattle is obviously going to keep JSN around for years to come, but he will need help.