He still leads the team in targets despite basically missing 2 games, he's their best route runner, and best RAC WR.
If I were ranking it as everyone is healthy, its Johnson>JuJu>Claypool, and if Claypool stays hot, I think its at JuJu's expense, not Johnson's.
I feel like we've been through this already with the Steelers with Conner, when people were ready to write him off after week 1, when he underachieved and got hurt, and Snell looked good in his absence. Johnson feels like a potential stud WR(especially in PPR) in the 2nd half of the season.
I'm not saying Johnson will 100% be the #1, but there is no reason to think he won't be, and he clearly was when healthy so far. Considering what else has been said in this thread, and in Claypool's, Johnson feels like an obvious buy-low for pennies on the dollar.