re: What does iowa do regarding OL coaching that lsu doesn't?

I hate questions like this because you clearly don't pay attention to college football

Iowa, ND, Wisconsin etc all recruit local 3* occasional 4* guys that stay 4/5 yrs. They buy into the system. Iow and Wisconsin will never win a national championship with their current offense BUT it's a system that's been in place for 2 decades so they remain relevant and can compete against your OSU, Michigan, PSU every few years do to the next crop of senior heavy classes they have.