My favorite quote is Colt saying "In no case should a ball run from the putter like a swine possessed by the Devil."
I'm all for varying contours from green to green, but play it a bit more conservatively. Just looking for harder putting and easier putting, not borderline unfair putting. Seems to me hard enough if you are never sure from green to green how a putt will break, and can't get a consistent feel for it.
In reality, those borderline greens seem to come naturally with greater speed. Even 1990's greens are borderline on slopes.
I once contoured a course heavily at the request of the superintendent (separate from the recently discussed contouring heavily for Larry Nelson) as his argument was sloped greens would mean members would be okay with slower greens. But, come the first club event, they demanded another few feet on the stimpmeter and then complained loudly......other architects have said the same has happened to them.
I am not sure we need to go from the USGA "identify the best player" but really embarrass the others in the US Open to doing so on the local muni or resort, where I do most of my work. If working at a private club, have at it, but I haven't seen too many requests for such greens.