Brian:
At this point I think I could go right through each hole and come up with a pretty good analysis of what Crump did before Colt arrived and what Colt did when he got there and then what Crump did after Colt left as far as how the course finally turned out.
The real key to this, at this point anyway, and in my opinion, is the overlay Paul Tuner did of the initial routing map that hangs in the maintenance buiding (Crump?) right on top of the routing map that Colt and Crump worked on that hangs in the clubhouse. We all are making certain assumptions about certain things to do with those two topo routing maps, of course, but given the timelines those assumptions do seem reasonable, at this point.
If those assumptions are accurate it appears that Colt probably bailed Crump out big-time on parts of the back nine particularly. One can see on the first topo (if that was Crump's work before Colt arrived) that Crump was sort of all over the place in some of that back nine section.
But as far as how or how much they worked together on that topo routing that hangs in the clubhouse, no one will probably ever really know as there's apparently nothing at all recorded from that week or two they were together.
A few things are clear, though, from cross referencing text with those red and blue lines. One is that Crump dodged a bullet by over-riding Colt's idea for the placement of the 2nd green by his remark "No Good". What Colt proposed for that green placement sure wouldn't have had the effect the present green does--it probably would've changed the nuancy approach to the 3rd green too as Colt's tee was right in the middle of what is now the 2nd green and where he had the green would've really squeezed that wonderful fairway ridge which is now the top of the 4th fairway.
Colt seems to have had the 7th green routed short and left and right into the middle of the 8th hole too about 150 yards off the tee. But I think Colt bailed him out a lot, at least in a basic routing sense, on some of the back nine and I have a feeling #9 particularly, is probably as close to a pue Colt design, particularly in its exact placement and in its bunkering as any hole out there. It's interesting, though, that Crump very definitely intended to turn #9 into basically a dogleg left but he died and obviously that was never done.