Hmmm...I'm inclined to agree with bacdorslider. and do not think that he should have backed from his original pecking order, especially with the surge in the SEC over the past two decades.
But our "collective awareness" of college baseball tends to be shaped by what we see in football. It is not the same. The changes instituted back in 2009 that made the limits of 35 roster spots, with 11.7 scholaships for 27 spots, and no one less than .25 leveled the playing field among the 300 D1 programs to large degree.
Many top players are selecting to play at baseball outside P5 for better exposure, increased playing time, lower cost of attendance, better academic fit, certain coaching philosophy, etc. Although there will still be plenty of over-commits at many P5 schools, many of those "over-commit" players will end up scrambling to find a D2 or Juco spot.
Whether the NCAA intended to improve the situation for the players or not, the effect is that it has. Graduation rates were abysmal among P5 powerhouse baseball programs. Arizona, the biggest offender, had a practice of bringing in dozens of freshman on .1 scholarships, or books only scholarships. Then (Arizona and most other power programs) effectively held fall tryouts for those that would make the "travel roster". Their (Arizona) graduation rates were in single digit percentages - like 3 to 9.
The SEC has the highest coaches' salaries, the biggest stadiums, and the largest attendance. These are facts, not debatable opinion. So it is the is the big dog - cynically because it is the most willing to exploit it's young baseball players to make a buck. Realistically, it is because it has the biggest investment. , Then comes the ACC and PAC. The BIG 12 definitely before the BIG10, but only because Texas is so top heavy. Pull out Texas and it is the BIG10 when it comes to baseball.