Herro needs to work on his layup and floater package. He needs to use more same hand/foot layups to throw off timing of defenders and put his body between the ball and the defender.
That said, he's been playing well this season and has been aggressive. He'll draw the necessary fouls eventually.
Jeremy Sochan's one hand, Rick Barry's granny, Korean basketball's bankshot... are all proof that Ben Simmons, Rajon Rondo, Shaq, Ben Wallace, Dwight, DeAndre, and every other lazy basketball player let their ego get in the way of doing real work at improving their free throw percentage.
Alohalhololololholaa
Anthony Davis threw that out the window. I still dislike everyone involved in that saga.
This is also why it's useful to put Sochan at PG. He won't be the primary ball handler when Wemby is further along, but the Spurs want Sochan to develop a Draymond-like skillset. Draymond handled the ball a ton in his 3 years in college, and he didn't become an All-Star & All-Defensive until he was 25. Sochan is 20. Giving him reps now will pay off.
Spurs are running multiple development projects at the same time. With Vassell and Johnson only being 23 and 24 years old, there are a couple of years to let these guys refine their games. The fact of the matter is that the point guard they need isn't on this roster yet.