Well, there may be a method to the seeming madness of lengthening par 3s. On first glance it seems stupid, since the recent rash of distance increase doesn't really benefit short irons even for the longest hitters, so a 165 yard hole is approached with pretty much the same iron as it was 25 years ago (though the number on a club of the same length & loft may be one higher today)
However, today's drivers give one a much smaller spread of distance between good hits and poor hits, so you don't get tested on as wide of a range of shots. If you took a par 4 of a length where a player would normally expect to hit a 9i into the green if he hit a nice square drive with a persimmon driver, a nice 1" mishit off the heel might leave him a fairway wood approach -- and that's true whether his "nice square drive" in the persimmon days was 180 or 280! Today with the same circumstances a 1" mishit probably leaves him a 6i.
When talking about how equipment has changed the game there's always plenty of talk about how only the pros benefit, or only long hitters. Well, they might benefit because a driver/9i is now driver/SW due to an extra 30 yards off a squarely hit drive, but even the short knocker who probably got maybe 5 extra yards for a squarely hit drive still benefits from this reduced distance dispersion. And, more to the point, since in general, players of lesser ability tend to be shorter hitters, this effect of big headed drivers tends to benefit them more than really good players (who seldom miss a drive by anything like 1" from the sweet spot)
On a shorter course, a significant portion of people playing it might be hitting short irons or less (after a good drive) into almost all the holes, save the par 3s. But nowadays they aren't taking all that much more club when they hit a poor drive, whereas before even a short hole could quickly become a slog after a mishit! Thus the par 3s tend to become the only place where you can test a player's ability to hit longer approaches into the green, whether it be a middle iron instead of a SW for a good player, or a fairway/utility/hybrid for the lesser player.