He received a lot of justifiable hype because he is the only active Roger Pirate member and the fact that everybody seems to respect him including seasoned warriors like Sengoku and WB, as well as the Gorosei. I personally don't mind Shanks getting hype. Any hype that Shanks gets, automatically gets transferred to Mihawk's hype.
But with recent development, the allure of the Roger pirates has diminished significantly. I don't know if Shanks' hype can recover.