I don't think anyone can be our franchise QB until they become our franchise QB.
Even with picks unless it's Payton Manning Or Marino coming out (someone that's absolutely can't miss prospect)
If Sam can keep this progression up yes he could be the guy. It's worth an 8mil gamble. If he doesn't pay off you didn't lose anything.
Vs say Signing Lamar who really hasn't done much losing multiple draft picks and having tons of Cap tied up in one guy is a huge huge gamble.
Risk vs reward.