At the major league level, he is clearly substandard in the K and BB areas, and needs to improve to be a starter.
DOMINIC SMITH: after a slow start, he's hit around .350 over the past 10 weeks, with a slew of doubles and an occasional homer. He sports a superior glove too. He has walked just 23 times in 81 games, while striking out 59 times in about 350 plate appearances, so both of those areas could improve somewhat. Having just turned 20 in mid-June, he (like McNeil) could certainly hit in AA right now. They’re presumably trying not to rush him.
But…while SS is a position where defense is treasured, Luis has objective under-performance vis-à-vis his competitors in lack of power to date (7 doubles this year, and only 21 career doubles with no homers), and lack of speed (zero career triples in 800 minor league at bats).
He is hitting .271/.307/.421, so he is not quite at Becerra’s pace. Only 11 BBs, and 66 K’s, in roughly 260 plate appearances, two areas that need obvious improvement for him to progress rapidly. His performance has been fairly steady all season, so unlike Becerra, no recent spike in performance.
I avoided going further down in the organization as of now...too early to tell on them. A guy, for instance, like Desmond Lindsay has yet to even play. Maybe he makes it in 2020, but wow, Donald Trump could be running for a 2nd term by then.