That BYU’s stadium is much bigger. But this observation is just based on what you said is in the article—I didn’t read it and don’t intend to.
That being said, one solution to having more sellouts is lowering ticket prices, and giving students even better deals on tickets. Not sure who makes those decisions, but lowering ticket prices and getting more sellouts would be a good response to Drew’s criticism. If you still want to maximize profit, you can always raise the prices again once you’re again having lots of sellouts and demand for tickets increases.