https://www.youtube.com/watch?v=jYn_Jx93TtQ
If you look at this video, you'll see that Dastrup was wide-bodied in high school.
Now at BYU it looks like he not only got out of shape on his mission, but that he also ate his companion.
If you look at this video, the thing that stands out to me is that he didn't have foot speed. Everything is slow. He's not explosive. Never was, never will be.
His upside is his shooting, IQ, footwork, occupy space as a big body.
And he probably needs to lose 30-40 pounds.