Interest in baseball had been waning somewhat during the second decade of the 20th century, given the rising dominance of pitchers, and thus low scoring games. In 1920, commissioner Landis instituted rules requiring much more frequent introduction of new balls into play (e.g., foul balls going into the stands were not returned; balls become deformed or discolored were removed from play). Notably, batting improved and so did interest in the game.
Let's suppose that some unnamed genius of a sportswriter (say, Hugh Fullerton of the Chicago Daily Examiner) came up with the idea. It seems reasonable people would heed his suggestion given that he broke the story of the Black Sox just shortly before. What might the All Star Games of the 1920s look like, with players like George Sisler, Babe Ruth, an aging Ty Cobb and Tris Speaker, and so forth? Would it still survive today, and what if any might its impact on the game as a whole be?