He had at least a couple nice games this year where he made key plays. The KC game stands out.
Mostly I recall hearing his name on a number of key defensive plays over the season, and thinking, "Hey, this benchwarmer/ST guy Akeem King is in the game, our regulars must be injured, hope the other team doesn't abuse him like Tharald Simon."
Then as the season went on, it was more like "Yeah, this King dude keeps making plays, clearly he earned his his way onto the field."
Every now and then we seem to have guys like that, who hung around on the practice squad for a season or two, occasional cup of coffee up on the main roster, back to PS rotation, and eventually developed enough to stick on the roster. And then some... just never made it there. Like that one LB guy with the great measurables who actually became a punch-line here, but was oft-injured and/or not good enough to stick. Can't even remember his name now. No, not Prosise. Before him. It was a supposed-to-be LB/TE guy. Oh yeah. Jameson Konz, "The Konz", Mr. SPARQ 150. I had to search and search for that name.
One poster child for Seahawks development was Jermaine Kearse, who worked his way up through a season or two of the Practice Squad.