this was the first game he started for Juve since December 7 and it's April, what did you expect, lol? I wouldn't write him off after one performance in his first start in 4 months
LCM isn't the same position as RCM just like LB isn't the same as RB, Lemina's main competition is Khedira not Sturaro. So far we've seen Asamoah, Sturaro and Pjanič there, I doubt much will change in the future.