I agree players can improve, but noting Young was better for a few games at the end of the year and comparing that to 50% of Harper's freshman season also ignores the 2 other full seasons of data on Young at Texas. His career assist rate over 92 games is 11.9% and a TO rate of 18.5% while shooting 27% on 3s, 47% on 2s, and 64% on FTs. It's not like Young just started slowly for the season, he has 3 full years of being a not efficient player with a terrible assist rate. The odds of him magically turning into a quality PG as a senior are pretty slim. I mean Paul Mulcahy had better assist and shooting numbers this season than the entirety of Young's career. The odds of him making a leap and being a decent PG are probably far higher.
Young was a spot up SG at TX and wasn't asked to facilitate and distribute. Even when taking his full season stats, his assists/40 min is nearly double this year what it was at TX (as are his TOs)... and his 3PA/40 has dropped from 7.8 at TX to 4.1 at RU, while his 2PA/40 has gone up from 4.6 to 11.0. The % of shots taken behind the arc dropped form .630 at TX to .271 at RU), and the % of teammates' FG that he assisted on jumped from 9.4 to 17.4. Pike has used him in a very different role than he was used by Smart, so it's not a very good comparison looking at his TX vs. RU numbers.
The question is if his progression/growth over the course of this year will continue next year or not. He struggled to get going in the first part of the year, then became a key part of our rotation and a more higher efficiency player down the stretch. Can he continue that development as a RS Sr, or will he regress?