Yes, I get that, but he is not likely going to be the FT LF'er, so we are probably only talking about the negative he brings in just a few games in LF.
Also, let's assume he plays 60-90 or more games in LF, because we sign Bregman to play 3B, and casas and Devers take up all the 1B PAs and most of the DH PAs. Does the 3B defensive improvement outweigh the loss we see in LF D?
It's my guess that if Bregman or Arenado is at 3B, at worst, Yoshida platoons LF w Refsnyder, so that might be 120 games, assuming Bregman, Casas and Devers play 155+ games, each. Whenever one is out, Yoshida would DH.
I'm not happy with Yoshida in LF. I wish we could dump him, and have tried to find numerous ways to do it, but it looks almost impossible, so we will end up trying to play him in ways the minimize the overall team's hit on D and running while maximizing the little plus he brings on offense vs guys like Rafaela, and Abreu v L only.