It is far too early to start talking about Smith-Schuster going to the Hall of Fame. Antonio Brown still has work to do to earn his way to Canton and he is a hell of a lot more accomplished at this point than Smith-Schuster.
Think about it. Brown had a run of about five years that he was the best in the game and this season he is still damn good, but he's not at that level. Maybe that is already the start of a decline. He is currently 35th all-time in receiver yards, behind the likes of Muhsin Muhammed and Derek Mason, neither of whom is going to get there. He is 29th in receptions, again behind guys who are not in anybody's HOF conversation. I'm not saying he won't get there. I think he will. I just think we need a little perspective on Smith-Schuster.
That bit about replacing Roethlisberger is a very big if. I'm not sure how old you are, but I was too young to fully appreciate the teams in the '70s. By the time I was a serious fan, guys like Cliff Stoudt and Mark Malone were starting over 20 years of mediocre quarterback play in Pittsburgh that didn't end until 2004.