I'm a diehard White Sox fan--I watch 150+ games per year on TV, and attend 10-12 in person. I live and die with the Sox.
I watched exactly zero innings of this year's World Series, and I think I maybe watched 20 innings of the postseason in total. I just didn't care.
I don't know what that says about me or baseball. Maybe nothing. But I gotta think if someone like me, who devotes his entire summer to baseball, doesn't care enough about the World Series to watch any of it, that MLB has some kind of long-term problem on its hands.