Tom, what does it mean to "design the green to accept a very long approach"?
I don't think of holes like 3 and 15 at Pac Dunes or 3 at CommonGround as being especially receptive to long approaches. 8 at Dismal Red takes a pretty deftly played ball from 200+ yards to hold, if I remember correctly. Same with 16 at Ballyneal - which may be your only par 5 that I've actually reached in under regulation!
I'm interested by that comment, but it makes sense to me given the reality of the median player likely approaching those holes from 150+ yards most of the time, which is likely a mid-iron or more. I think there's a difference between "accepting a long approach" and "coddling an undisciplined play from someone with a lot of swing speed."
In all the cases above, there's trouble lurking for poorly played shots and angles available that a person reaching in 3 can take advantage of to help mitigate some of that trouble. I sorta look at them as holes that "defend par (or birdie, for the strong player) on/around the green," rather than defending par from 150 yards further back where the average player will always get punished more frequently than the guy whose ball flies 100 ft above the trouble. The player tacking his way up Dismal Red's 8th can attempt to play well left on their second shot to take some of the risk of the third out of play. Maybe that shot's boring to some players as the ideal approach position isn't explicitly defended, but it's also not explicitly defined. It's the guy who stays mentally engaged who gets a chance to create an easier third.
I'm thinking of it as similar to how a par 4 can be interesting even without a bunch of fairway bunkers - potentially even moreso if it instead leans on a player understanding the final 50 yards of the hole to dictate how they play an otherwise "unchallenged" tee shot.