Certainly possible. Its gotta be hard to coach players in any sport with such insanely good basic skills though, like, they've never really had to think about their approaches and just succeed based on raw talents alone. Now they're tasting failure and don't understand how it can possibly happen because it's never happened before. Plus, how many times have we head coaches say "just stick with it, dont get down on the process, the results will come as long as you're consistent...etc etc"
I hate it when i hear that BS cliche. That, and practice makes perfect. No, practice doesnt make perfect, practicing perfectly makes perfect. If you practice wrong, you dont get anywhere. If you don't adjust to what pitchers are doing to you, you don't get better or even maintain your results. Whatever the mental block is in Vlad's brain about swinging at garbage and not being ready to punish mistakes has to be overcome. He's too good to be hitting like this.