I'm still thinking this through AP... I love the idea of balancing the cost for ALL high end recruits. And I know that you've said that this would only apply to D1. But I'm trying to think up a uniform standard for D2/D3 as well.
Don't let this comment pull the thread off of topic, but I've got this hatred for the walk-ons that end up on teams. In the new system, I'd like to see a way to create better walk-ons @ D1 (even D2) and mix it in. I think both issues could be addressed as one. Even if this means that D2 gets to deal with the potential of their Jr. / Sr. leaving and going to D1, just like elite D1s deal with early entry. Or if it means that a top level D2/D3 recruit might decide to walk-on at a local D1 school. Obviously some indication would need to be given to the D2/D3 that there is the potential for this.
As for the core of your system, I'm down with it, completely. It may need balanced, because I can see 3-4 top 10 guys signing. But if I know that the A+ school is going for 4 of them and I know the cost is significantly more for each one... then I'd definitely take a few shots.