Go44 dad, Bum, Jr. pitched against both types of bats as they made the change 1/2 way through his college career. The lack of a college slider and sinker did hurt in college. The new bats are better as the exit velocity is lower but the sweet spot is still way larger than with wood.
TPM's son is a true power/sinker pitcher. Those types are VERY successful against wood. Bum, Jr. doesn't have a sinker but has the advantage of being a LHP, an average MLB fastball, a good to plus curve, plus movement, average change and is working in a cutter now. He does get good fade and sink on the change, however.
These are the pitches he misses bats with. Setting hitters up. Not overwhelming velocity.
I agree with TPM that summer wood bat leagues are not equivalent to pro ball. The hitters are just too disciplined to swing at poor pitches.