Yankees manager Joe Torre said that he prefers a stable rotation to home-field advantage. However, I assume veteran teams, such as the Yankees and Braves, don't need it as much as the White Sox. Now, on to your questions. All it takes is for one or two teams to be successful and other teams will follow. But, you know it makes sense.
Money is nice to have, but having a team grow up together is more important.
Oakland is going to be the next powerhouse, given their young talent. And the White Sox have the best pitching talent of all among prospects. You make a good point. The Blue Jays have lots of questions, given their new ownership. If so, they are going to have to go for a big-name pitcher, someone who can anchor the staff.