You should ignore his 2019 season, and frankly the second half of 2018. His elbow issues were so bad he literally changed his arm angle on throws to 1B. That impacted him significantly even after TJS, I know this because I know the player. As for exit velocity he has never been someone who grades particularly well in that category, he has a career 85.9 and his xWOBA has generally hovered around .300 in every year but his career year in 2018. It hasn't stopped him from being an above average hitter by wRC+ in 3 of the last 4 years.
The reason I believe in him moving forward, aside from the obvious bias is that he is healthy, and he has improved consistently on his already strong K%. The BB% will always leave something to be desired because he is an aggressive hitter philosophically, but the rest of the package combined with the defense is still very desirable IMO.