Kiermaier is Zimmer-level D with a Tapia-level bat. Acceptable as the primary CF as long as he is nailed to the bench every time they face a semi-decent LHP.
IMO, we don’t need to think in terms of a Teoscar replacement vs Tapia replacement etc. Bigger picture, Springer is now the primary RF. That’s good. Kiermaier is weak overall as an everyday CF, but luckily Springer can also play there when Kiermaier sits. Gurriel is a decent starting LF but not very durable so he is going to miss a bunch of games. They need one more solid bat-first OF. Brantley, Conforto, Benintendi, there are a few decent options.