The work done by Ed Shearon and his company at Whitemarsh is sort of a mixed bag. Some holes like 11, 17, and 18 have a really good look that tries to emulate the prototypical Thomas bunkering style as we've grown to know it. I've also spoken to Geoff S. about it and he is not quite so enamored as others have mentioned, although I'm not sure that Thomas wasn't still in that fledgling architect stage when he did the course, and I doubt it was ever quite a masterpiece, despite several very good holes on cramped property.
I also know that both Flynn and Ross did additional work there, so it's tough at this point to really decide what true renovation should entail exactly.
However, one huge disappointment to me was the work on the par three 12th hole, which adjoins the highway and which is featured in Geoff's "Golden Age" book on page 91. I would guess that the club probably faced a number of complaints about balls sailing right of the green onto the busy road, and with liability considerations, decided to build really large, unsightly containment mounds to the right of the green. (The "highway" was a dirt road when the course was built).
That change may have been unavoidable, but the ones that really were jarring didn't seem to be neccessary. First, the steep faced bunkers appearing in Geoff's book have been altered into some really overly fussy numbers that diminish the visual impact. However, what really threw me was what was done to the formerly quick runaway left of the green, where a ball slightly left and missing the green would be propelled far down the hill (25 foot drop off) away from the target. On a hole of that length, it really put a premium, in a very natural way, on an accurate tee shot, particularly to back left hole locations.
Shearon's group created a series of terraced "steps" on the left side, which serve to slow and stop a ball before it bounds down the hill. It looks terribly contrived, and also neuters one of the hole's chief defenses.
I remember arriving at that hole with some of the gang from here, particularly optimistic after playing the lovely 9th, 10th, and 11th, and with all of us familiar with how the hole used to look, we just sort of paused and stood around dumbfounded for awhile. Finally, I said, "I don't think Geoff Shack would want to see this."