I wonder if more effective in certain situations than others would be a fairer description. In a game like Wigan he’s literally all over it… However in other games his overall contribution is still very good and he will still create chances.
Hopefully the addition of Dembele will give us an additional option and perhaps enable us to be much more effective at unlocking the opportunities in those sides who set out to defend.
And as you say, CJ can be used as a sub when legs are a bit tired and the game gets stretched.