We will always be bad on the boards as long as Shaka is coach. You are right about HC's proposed starting lineup, but just prepare yourself for that to always be weakness in our game under Shaka.
HC explained where the freshmen will fall at the bottom of his post.
I think that might be an overstatement. We were definitely terrible last year, but I do think it was something of a negative outlier.
Our #325 offensive rebounding rank was the worst of Shaka's career by more than 100 spots. His 12-year average coming into Marquette was 131.8. It's not great, but if we can regularly be in the top-200 (which 9 of his 12 teams were, none worse than #218), we'll be fine.
Our #314 defensive rebounding rank was not the worst (#330 in 2020) but his 12-year average coming in was 237.6, so less encouraging but certainly better than we were. In looking for some sense of encouragement, I did note that of his seven sub-250 defensive rebounding seasons (including this past year), five of them came in his first three years at a job. So maybe some reason to think with time it will get better (though that #330 did come in year 5 at Texas, so maybe it's just trying to find a positive pattern that doesn't really exist).