Re: MLB playoffs versus NFL/NBA/NHL playoffs
They already are starting the season close to two week earlier than usual to make sure the World Series doesn't go into November.
Selig already proposed a 154 game regular season schedule with an expanded post season that ended earlier, but the owners won't go for it. I think this will eventually go through once owners realize it's in their own best interest. Regular season games replaced by playoff games = more money for everyone.