He's only 23 and doesn't turn 24 until September. They called him up way too early in 2019. It's one thing to rush Bryce Harper and Juan Soto, but Kieboom just wasn't ready. I'd like to see them send him down and tell him there is zero chance he is back until late in the season. See if he the player development staff can fill some holes in his game.
He was 21 in 2019 with 500 AAA at-bats. I don't really think he was rushed, definitely not to the extent Soto and Bryce got bumped up. Luis Garcia got rushed last year.