Only one par 5 at Hazeltine strikes me as a slog -- #15.
I agree with Jason about #3, which has a lot of character: either hit your tee shot long enough to clear the bunker on the left side, or try to squeeze your drive beside it and keep it out of the right rough as the hole doglegs left. Then you need another well-judged shot, probably a long iron, to leave yourself an approach shot from the top of the hill, rather than letting it run closer to the green, which leaves you a short iron approach from a downhill lie to well-guarded green above you.
For some reason #7 isn't usually held in high regard, but it's a strategic challenge. If you want to reach the green in two, you've got to carry your drive over the trees on the right corner of the dogleg right fairway. You can comfortably play to the left side of the fairway, but it's the longer route and it brings the pond in front of the green squarely into play.
Number 11 also requires some thought as well as execution. The short route to the green is down the right side, but that's the worse angle to the well-bunkered green -- you can even get blocked out by trees on the right side.
I don't see those three holes as slogs at all. Of course, when I have played them, I'm not teeing it up at over 600 yards. On the other hand, I don't drive it 320, either, so I'd guess the holes play pretty much the same way for the college boys as they do for me.