I haven't seen Ottavino throw. I know he had TJ surgery in 2017 and came back strong in 2018 but I get a little nervous when I see a team with several pitchers who've had that. TJ's aren't always successful long-term. Price has had it, Brasier's had it, and Sale's motion fairly screams, "I'm going to have elbow trouble sooner or later!!". Ottavino may be another good risk, but there IS a risk, especially when we already have two (or three) who may have arm trouble in the future.
All of that having been said, yeah, "O" would be my first choice.