I still have questions from that players only meeting / scrapping the hitting plan time frame from last year. I kinda expected Popkins to make a graceful exit in the offseason as it seemed a direct repudiation of his program.
I could also invision a scenario where he made adjustments in that period and was part of the fix. I still have the same questions about him that I've always had. He might be the most technically proficient instructor of the swing but without high level experience as a coach or player he will have blind spots. It would stand to reason that Mike Maddux would be two steps ahead on a game plan.
The recent correction for Jeffers is interesting. As reported it was a slight tweak to his swing found in video reviews with Popkins. OK great, it worked, but Jeffers wasn't swinging at garbage two feet off the plate at the time.
My suspicion is that Popkins is too technical and that's what's in the players heads in the game. Everything we hear is Correa elbow moved here, Buxton leg kick there. Those things are important, but you can't be thinking about it during the game. Practice, then execute. All the in game thought should be on the plan of attack for that days pitcher. It doesn't matter if your little swing change isn't quite locked in, go with what you got and work on it later.
Part of the reason for my suspicion is that the game plans suck. Not just not ineffective, actively bad and counterproductive. I was an advocate for a special assistant Nellie Cruz or Molitor, insert whatever name here, as a voice that knows how to attack a pitcher and pair it with the technical data.
Coaching can only do so much but bad info against 98 and you're screwed from the start.