Hitters have to adjust all the time, and as pitching gets better, even more so. And if part of their adjustment is Bat Drag or Lunging, then that's an issue that needs to be addressed. It's no different than identifying these flaws in their regular on time swing, if a hitter uses bat drag and lunging to adjust(that's their adjustment mechanism) then they will be at a disadvantage. I'm really surprised with your view on this topic, I thought your approach was all about getting to a place of leverage(FYB), being balanced and ready to launch at any pitch speed without mechanics going down the toilet.
I mean this
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or this
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If you just compare the two. It’s easy to see one is farther along and thus uses what they have left to adjust.