At this point who cares. Just sign him for two years and draft a guy next year. If this years draft had better talent at QB I would say go for it this year but the Steelers would need to trade into the top 5 spots and that isn't happening.
So whether it is Mason Rudolph or Rodgers it really doesn't matter, they aren't winning the Superbowl. I'm not expecting Rodgers to mentor anyone. Just go out and read defenses and make the throws.