This is a pretty big deal, I think. It's a 'rebirth' of sorts for this lineup of hosts and shows. And as was mentioned earlier, Yahoo Sports itself has several segmented platforms (Rivals.com, The Post Game, Associate Content and the NFL/NBA/MLB/NASCAR/MMA sports blogs), which means there's much more in the way of content and contributors they can utilize.
I can definitely see them gaining a few affiliates out of these changes, some of which might be ESPN Radio defectors. I know of one small market example, WNSP in Bay Minette/Mobile, AL, who dropped ESPN earlier this year.