Not sure what you mean when you talk about his talent. Namath was a below average NFL QB, even in his era. He was a celebrity playing on the biggest stage (NYC) whose defense made him look prophetic in the only really big game of his life (in the pros).
No idea if Manziel will ever hit that level of "celebrity" status, especially playing in Ohio, but just getting drunk and acting stupid isn't going to get him anywhere close to Namath's status.
Not sure I understand any of what you are saying. Namath was a below average QB? Have to disagree with that completely. My point was/is JF is already a celebrity and I believe his skills will be proven even if he is in Ohio. Didn't Jim Brown play in Ohio? JMHO