Seems to me that getting rid of the 25% minimum will help SEC/Big12/PAC schools and to a lesser extent, schools like Tulane, USM, ECU, etc.
For example, you might have a situation where someone like a Presbyterian or USC Upstate offers a player 25-30% vs walking on at Clemson or South Carolina. So now CU/USC can offer 10-15% which could maybe sway a guy.
On a somewhat smaller scale, you could have Central Arkansas or Jacksonville State offering 40% to a guy vs Tulane or USM offering nothing. With this rule change, Tulane/USM could offer 15-20% and maybe steal a guy that would rather play CUSA/AAC ball over Southland/OVC for a little less money.
Someone correct me if I'm off here, but this is how I see it.