It would depend on what it would take to get Nootbaar obviously, but I think there would be real upside there. He's already had a couple of 3 WAR seasons in his career, and last season despite battling injuries he was well above average to very good in Avg EV, hard hit %, bat speed, chase, whiff, etc.
Realistically, there isn't a position where the Jays could significantly improve unless they trade for Marte or something like that. I guess maybe if they sign Framber and dump Berrios, but on the position player side, the only meaningful upgrades I could see would be a 2B against RHP (Clement isn't good against them historically) or a move like this where if you believe you're buying low on a ~120 wRC+ bat with some injury risk to replace a more average-ish 4th OF.
Plus, I believe Noot is popular in Japan due to the last WBC, so it would give the Jays another player that can help to kiss more Japanese backside as they try to grow their brand there.