Jim,
Patrick has contended that an option needs a specific parcel, but I see no reason that it would have to, if the thing that needs to be studied is a boundary within a boundary. Not a lawyer, could be wrong.
I disagree with you on two points-
That Alps hill might have been approached from two different directions, maybe more with similar results, and that would be determined by how the holes before and after worked out. It didn't route itself.
Also, I think there were financial constraints at both NGLA and Merion. CBM didn't have the money for the clubhouse, and thus had to persuade the Realty Co to build a hotel that would double as his clubhouse. Merion had a budget for land purchase, which they had to stay within, but eventually went over by three acres, costing them, I think, $85K, much more than the origina 120 acres they had agreed to. Just because some of the members were wealthy, MCC had to consider costs for all members, and its clear from the subscription agreement that CBM wasn't going to front his dream project with his own money! Rich folks rarely do.....
And, as I mentioned to your similar comments on the Merion thread, of the 50 courses I have designed, I may have had parcel flexibility on 4. Both these courses were lucky and ideal in the fact that they built in some flexibility with the landowners. That Behr devotes an entire 1915 article to that ideal suggests that many courses back in those days didn't consider parcel size and shape before hiring the gca or forming the committee either, doesn't it?