Part of the fun of Selection Sunday is debating who should be in and who should be out. Miami (Ohio) doesn't deserve an invite. Texas might deserve an invite, but Mississippi might have been one bad loss at the wrong time. I don't have the history on this, but these mega conferences get so many bids that I will be surprised if 18 win teams from these major conferences get bids. These conferences are already going to be well-represented.
After it's all said and done, I don't think Miami (OH), Texas or UCF could make hay in the NCAA tournament. It's just fun to debate the selections.
Interestingly, most of my friends are 50/50 as far as the worthiness of Miami (OH). I would say of the 50% who think Miami (OH) should be in the tournament, they are surprised when you start naming their non-conference opponents. It's really a scraggly bunch of basketball schools.