A number of us watched game film (it's available on youtube) when our interest in this kid became public knowledge two months ago.
As
@Fishy mentioned elsewhere, he has quicker feet in traffic than you seem to realize, and knows how to box out. He hits his free throws and can pass the ball (though sometimes he thinks he's Bill Walton, to his team's detriment). He's not a program-changer but he's a P5 player.
In the last 3 classes he signed two 5-stars (Durham & Brown), four 4-stars (Carlton, Polley, Diarra, Enoch), and one elite postgrad (Miller). In the previous three classes he signed zero 5-stars, one 4-star (Kentan), and had zero significant big-man transfers. So I think you're using the wrong tense wrt his ability to recruit bigs.
I also disagree w/ your assessment about big-man development, with Facey as the most obvious example. I can't imagine how it's possible to look at that kid's season and say "Ollie hasn't developed him!"