I'm interested as well. It seems that the Ivies can reasonably strive to be a more than 1 bid league. Surely there have to be plenty of smart girls who realize the value of an Ivy education. And frankly, with the endowments they have, need based aid often puts them on par with other schools in terms of actual cost.
The biggest "problem" I see is the need to have girls who are willing to wait until later in the process to commit. Ivy coaches simply can not make the promises other schools make. I'm not suggesting this change, but hopefully the current coaches overcome this obstacle.
Given the use of RPI it is in each school's interest for every Ivy League school to get better.
These schools do it in lacrosse, Yale just won the NCAA in hockey and Harvard and Princeton have recent success in basketball. I don't think it's too much to hope softball follows this path.