Supposing few will be able to go for it in 2, will the added length lead to a layup yardage where they can spin the approach, thereby making the hole a driver, 9 iron, gap wedge? How silly would that be? And how boring?
I don't know....I don't really find it silly or boring. Pros loathe not being able to birdie a par 5, and so in general, seeing which ones have the patience to lay up when the second shot is too risky is very interesting I think.
I still think at least half the field will be able to go for the green in 2, but if it ends up being "few," as you suggest, I still think it's exciting. These guys can stop/spin their wedge from any distance, so I don't see all of them laying back to some full SW length...some will try to leave themselves very close probably.
And the short pitch is no bargain. If they didn't put the second shot in the right place and have a bad angle, getting the third shot close becomes much harder. There will be plenty of guys who will overplay it or spin it too much, some ending in the water, and then some underplaying it, ending up in the swale or the bunkers, where they all hate the next shot, particularly if the pin is in the front.
Remember it galls them to not make a birdie, and so, after having swallowed their pride to lay up, many will be tempted to play risky shots with their wedge, shots which are as fun to watch, IMO, as a towering mid iron aimed at the center of the green.