Well, i'll start...
Gil Hanse gets the nod to rebuild bunker complexes per old aerials - not to the drawings as Ron Prichard did per the late 90's renovation. As many on GCA.com know, this was quite a contentious issue among some very knowledgeable people.
In addition to the bunker work, the widening of fairways, especially in places that tie bunkering into the fairways, and the continued expansion of greens to their original pads seem to be key elements of this "sympathetic restoration". Having played or looked at photos of other restoration/renovations of Ross courses, from Beverly in Chicagoland to Camden CC in SC to Timuquana in Jacksonville, this look that we're about to see again at Aronimink will be unique among Ross courses.
The one missing piece of this plan, IMHO, is what to do with the ponds that front the 10th and 17th greens. It's my understanding they were not in play as they are now either per Ross' drawings or the 1929 photos. It's my hope that they get "put back" to where they were.
WWJr.