Sean,
only 5 original greens remain (holes 2,7,8,9,10,17), and 13 greens have been modified or are completely new greens in new locations. That is the reverse of R Hague where 13 greens were original and only 5 greens were changed.
Of the changed greens three are quite good and could fool people as original Colt greens (holes 1, 4 and 18), the orthers are quite obvious modern greens.
At the moment agronomists are looking into if the greens need to be renovated from an agronomical point of view. If that is the case then we need to redo all the greens, faithfully restoring the 5 originals and creating Colt like greens for the other holes.
If the greens do not need agronomical renovating, then we can focus on changing the non original greens.
In any case there are likely to be significant changes in the greens over the next few years.
Goal will be to change the new greens that do not fit into a more Colt style.