I'm sure maguire knows what he's doing.
Cam can put bigger forwards on their backs, cook can't, mcinnes is great at winning the wrestle and forcing slow play the balls, cook struggles in that department. Cam had an effective flat ball in the smith style. While cook is fast, it doesn't mean mcinnes is slow. Segaryo is faster then cam smith out of dummy half, that alone doesn't make him a better player. Mcinnes is probably as fast if not faster then guys like smith, both friends, ballin, mcollough or Ennis. Mcinnes also has the ability to play lock. With the reduced interchange coming into effect, smaller defensive locks in the dallas johnson/ash harrison mould may make a comeback. With the reduced interchange having an electric hooker come on fresh at the 25-30 minute mark to take advantage of tired forwards may be master stroke that other coaches wouldn't be able to achieve because they don't have the players with cooks and mcinnes ability. Mcinnes to start and lay a foundation, cook to capitalise on that then mcinnes to come back on later in the game as a back rower.
Without a cook or mcinnes on the bench the spot gets used by an extra forward, the days of outside backs on the bench are getting rarer and rarer