They very well may severely limit Yoshida's ABs. He may even start the year on the IL.
As of now, we have two options, if we platoon Abreu in RF: a shaky Refsnyder or Rafaela. Playing Ref in RF is no worse than Yoshida in LF (at Fenway, anyway.)
If Rafaela plays RF vs LHPs, Duran moves to CF and Ref plays LF. There is no room for Yoshida vs LHPs.
Vs. RHPs, one could argue Yoshida's offense and poor LF defense still outweighs Rafaela's great CF D and awful offense, but it's not a clear cut choice. They could easily choose Rafaela in CF, and he plays FT (CF v R and RF v L.) That is a nice set-up, too, especially if Rafaela can hit better. Rafaela's reverse splits may be a fluke, and he's been so bad from both sides, that I'm not sure the L-R thing matters with him, but it does with Yoshida and Ref.
Cora has some choices and may mix and match to try and get everyone playing, just enough to not get pissed off. None of the guys I just mentioned should feel entitled to play, everyday, but Yoshida might feel he is.