I think it shouldn't be viewed as two lost year. Rather two years spent differently. One of the biggest issues was his swing, instead of meaningless minor league games he got an entire season of coaching and training by the staff to sort it out without distractions. The ACL hurt, but that doesn't mean he didn't chat with Simmons about how he preps, maybe he learned Spanish to help communicate, and there is VR to help with pitch recognition out of the hand.
What I am trying to say is, the kid didn't spend the last two years playing X Box, he had the opportunity to train in ways other players simply don't have the time for and that can make him a long term impact player.
Good luck Royce