How would this format work for Major League Baseball?

The playoffs wouldn't prove who is better. Anyone can win 2 out of 3. All playoff series should be 7 games. You have added a 4 tier of playoffs which makes the season too lengthy. Plus 18 interleague games is way too many. The expansion teams would thin the talent level of the MLB a little too much. You obviously did a lot of thinking about this, but there just isn't a realistic way of this working. You end up making more problems then you are solving.