It isn't a tough call. Samuelsson, E Johnson, Clifton, and Jokiharju have all played worse for longer stretches than Ryan Johnson, who btw is 22. Since you mentioned him being young elsewhere, Dahlin and Samuelsson are 23 and Power is 21. So scratching him because he is "young" is quite frankly a bs excuse (not saying that is what you were saying, just wanted to point it out".
It has been 6 months. What's he supposed to do? Ignore the medical experts and his own feelings until some rando on the internet feels it has been long enough?