Guys can take a while to get fully well, even if they're on the mound. The most obvious recent major league example is Lance Lynn, who missed 2016 and had a bumpy ride in 2017 and 2018, before getting back more or less to being the pitcher he had been. In the Mets system, Peterson was two years removed from TJS and exceeded expectations by a lot, but he was so-so in the minors in 2019. And Kilome was one year removed this past season and really not ready; I wouldn't pencil him in anywhere other than Syracuse to start the year, but I certainly wouldn't give up on him. That being said, I'd be willing to keep Lugo in the rotation for a couple of months if the expectation that Thor will be at 80% by the ASB is reasonable. But, assuming Stroman returns, we still have a big hole we should try to fill with a #2. And if I decide that's not a reasonable timetable for Thor, we will need somebody else as well. Better players than Matz are being non-tendered. He's not returning.