To me, it looks like you’re lower half is a bit rough, based on that angle. Not rotating into footplant (seem to be front leg dominant) and your front leg isn’t bracing well.
For example, watch how Tom Seaver’s back leg/hip rotates (even though his front leg is significantly bent).
Also, here’s good use of hips (Felix Hernandez).
It may be worth taking a look at BTT’s Core Velocity Belt (which gets you to feel good lower half actions).
What do you feel with your legs and hips?