Looking at Holmgren's stats, and so far he's been everything you would expect. He's shooting 68%, including 80% from two-point range. Per 40 minutes, he's averaging 17.8 pts, 11.5 reb, and 5.5 blocks. His PER is 30.5. His offensive rating is 129 and his defensive rating is 77. The only things holding him back are his relatively high turnover rate and his 20% three-point percentage.
I don't see how you draft Banchero over him at this point.