I'll bite.
Muirfield has superior routing; better set of par 3s, 4s and 5s; and much wider off the tee than seems to be so regularly referenced on GCA.
I think it's a very good piece of land and I'm not sure why it's seen by so many as featureless. We're not talking about the first 3 and last 5 holes at Hoylake, here. Muirfield has plenty going on in terms of subtle elevation changes, rumpled fairways, some semi blind tee shots for the quirk we all seem to crave - and a completely blind tee shot on 11. The greens are exceptional with some being tilted (1,2,4,7,9,10,11,12,13,16) and others being a little wilder (5,14,15,18)
There are a lot of bunkers, yes, but plenty of room on the fairway to navigate them. The course is visually intimidating off the tee and I think this is where the notion of it being narrow comes from. Once you get down there its much wider than you think but if you've found the rough with driver, it's not often you'll glance over to see how generous the fairways as you'll be head down in some pretty nasty stuff.
Perhaps not so much room for error around the greens but by and large there is always a place to leave your shot.
1. left hand side approach
2. as above
3. as above
4. tough shot, granted
5. chase in from the right
6. short left is still a bunker but better than right, just a tough hole!
7. wedge to 8-iron on a standard day to a par 3
8. bunkers well short of green so a fun carry for a second shot - green very wide
9. chase in down the left
10. very wide entrance to green
11. tight but it is a short 4
12. tough approach but short left the miss
13. great par 3, tough shot
14. wide open left side on approach
15. very wide but granted, very testing green
16. tough shot
17. I don't think I've ever been in the greenside bunkers because if you can't make it in two, they're out of range, if you can then it funnels onto the green nicely.
18. very tough approach
For the most part Muirfield gives you an option to bailout - hardly any true "do or dies" other than the par 3s and 18, really.
Dunbar is a lovely walk, with some real highlights and underrated by many as a course - but there is not one hole I would switch out for one at Muirfield.