Ian,
I would definitely characterize the mounds in question at Augusta as intended to be strategic and I would have to guess odes to 14 at St. Andrews (since it was on the minds of Jones and MacKenzie so much at ANGC). I don't know if these features a so strategic anymore because the ground game is just not part of the equation for most, and thus, hiding the area of approach just doesn't impact many players.
In both instances the mounds make it hard to see and confidently attempt a bump and run approach to certain hole locations. Both also hide the ground in front and on the green from certain sides of the fairway (I believe the primary original purpose). But with Augusta now dictating the play off the tee, on 11 especially, the charm of the mounds is lost a bit, though not completely. And of course, with the shift in the way approaches are hit (to all aerial), that plays a role in diffusing the importance of the mounds. But still, I was shocked by the mound on 14, it really is a visual annoyance for drives hit down the left side, something you don't get a feel for on television, particularly if the hole is cut in the back left location.
Geoff