Patrick,
Were these recent flattenings done to help the "average" golfer, or because green speeds demanded by good as well as average golfers made the greens unplayable?
As you have, I've been in meetings with memberships about renovations, and what I heard from average and women golfers (as well as some better golfers), is fear that the course will be made EASIER, not harder, either by tree work, shortening the course from forward tees, etc. I believe that Tom Doak has said that he often hears from clients the same fear -- that his work will make their course too easy.
Also, I don't see many modern architects building courses without striking features. Do Coore/Crenshaw, Smyers, Nicklaus, Doak, etc. etc. build unremarkable, unchallenging courses? And I also recall Pete Dye's view that golfers remember the one "heroic" shot they made more than all the misses, and that's what they go to his courses for.
As to renovations, in Chicago Ron Prichard and other architects have restored bunkering to more original configurations after time and other things turned the bunkers on these courses into featureless sand circles with no lips. Not anymore. At Beverly, Skokie, Olympia Fields, and others the bunkers are now real hazards, which require decisionmaking and exact penalties for wrong choices or execution.