COACHING Penn State lost two standout assistants and replaced them with two other high-level hires. The headline is defensive coordinator Tom Allen leaving for Clemson, but I think replacing him with Jim Knowles of Ohio State is an absolute homerun. Knowles is a Pennsylvania native and the best defensive coordinator in college football, full stop. It is a massive win for the Nittany Lions to pry him out of Columbus. Running backs coach Ja’Juan Seider, perhaps the best in the business at this rol…