Another reason, and a big one...
The devil is in the details here. There is 'consensus' for having an early signing period. There is no consensus among the P5 schools about what that should look like. You should read that as what the SEC and their P5 brethren think will give them the most recruiting advantage.Sankey and Delany want to revamp the whole recruiting calendar if they're going to do an early signing day. That's why this one didn't pass.— Andy Staples (@Andy_Staples) June 17, 2015
But to be sure, they'll couch it in player welfare terms.