I'm back to my old ways. Having a lot of trouble being late on pitches I shouldn't be late on, and not pulling the bull with any authority. .
In the near future, make sure you're totally commited (dead red) to fastball a few times when you're not behind in the count.
If you're late despite being 100% dead red, then your recent trouble might be mechanics.
If you're on time, your recent trouble is probably approach. (For instance, not enough dedication to capitalizing on fastballs in fastball counts.)