Skipping batting practice isn't that big of a deal? If in fact he skipped work, It's a huge deal. Enormous. There have been multiple troubling reports on Sano's work ethic, maturity, commitment etc etc since last winter. Where there's that much smoke, coupled with declining play, there's likely some fire. Misplaying some chances is one thing. Struggling somewhat in your sophomore year can be explained. Not doing much to fix those issues is a whole new level of problem.