Not bad @2022dad, his posting isn't really all that bad and pointing the ball toward the second baseman is not necessarily bad since he rotates his torso that far as well, so in my opinion he stays connected there.
I think his bigger problem is the spongy landing leg. He's not firming up on it. It's absorbing energy rather than transferring energy up through the body. Being this low also is limiting on trunk flexion.
My son was throwing low 70's with this flaw he developed when he was 12/13 pitching off his first 60/90 field. I still think he developed it as a compensation for the ever-present landing pit or as I also call it--the forward foxhole. As soon as we firmed up his landing, he was able to vault into the upper 70's. Two years after fixing it, he's 16 and in the low 80's.
I mention my son because this year he is a child-possessed about his workouts. He really worked on his squats, forward and lateral lunges, and he has been planking and doing hundreds of quality sit ups each day to strengthen his core and improve his dynamic balance. He also has very strong arms since he can rip off 35-40 pull ups at a time. He knows how fast I throw still and he really wants mid 80's this spring. If he hits that he'll pass where I was as a HS Senior while he'll be in his Junior year. I think this is the year he will pass me in velocity (I still have a low to mid 80's 4-seamer).
I think, for Zach, he needs to work on his conditioning to take the next step. It worked for me, it's working for my son, too.