Eh, I think Cal does a good job of teaching bigs how to use their size as shotblockers and learn to play big, Skal was just his first real big miss, mainly because Skal actually hadn't played any real HS ball prior to going to UK.
Cal actually helped KAT a lot, there's a reason why KAT wasn't the number 1 recruit going into college and it's cause his post game was weak as fukk. He learned to play like a big at Kentucky and the Dominican national team under Cal. He was a soft jumpshooter that thought of himself as a SF or some shyt

Cal put him on the block and made him work on that weak part of his game, now he's a beast in the league. Cal has far more success stories with his big men than he does stories like Skals.