Here's my analysis of the list:
1. The Ridge at Jay (Yes I'm counting this, its inbounds and lift accessed)
2. The Slides at Whiteface
3. Brackett Basin/Burnt Mountain/Western Territory/Backside of Snowfields (God knows what kind of crazy stuff they got out there) at Sugarloaf
3a. Paradise at MRG
4. Face Chutes at Jay
5. Tramline at Cannon
6. Goat at Stowe
7. Black Hole at Smuggs
8. Tuckerman's Chute at Jay
9. Freefall at Smuggs = it's steep, sure, but wide and straightforward
10. Green Beret at Jay = its a short steep pitch and mediocre skiing afterwards
11. Starr at Stowe
12. Dynamite at Tremblant
13. Snowfields (Ignitor,Bubblecuffer,Powder Keg etc.) at Sugarloaf = it's open treeless terrain that really isnt that steep
14. Rumble at Sugarbush
15. National at Stowe
16. Liftline at Sugarbush
17. Expo at Tremblant = superwide, often groomed, just a continuous moderate pitch
18. Rumor at Gore
19. Blazer's Bluff at Whiteface = c'mon, this "trail" is so short and the pitch in question is way shorter
20. Ripcord at Mt. Snow
21. Lower K27 at Hunter = ridiculously short, it is indeed steep but wide and not particularly difficult
22. Power Line at Jay = as I've already said, many runs tougher at Jay.
23. Liftline at Stowe = isn't this run regularly groomed and is pretty damn wide?
24. Steins Run at Sugarbush
25. Lookout Below at Whiteface
I only pointed a couple runs out, but there's nothing particular difficult for many of these runs. Madonna Liftline IMO is definitely tougher than Tuckerman's. Tuckerman's isn't anything special - its super short, somewhat steep and rocky while being narrow but, once again, not particularly difficult. Madonna Liftline has some mandatory airs and varied terrain on a much steeper slope.
Kitz Woods is pretty steep and probably IMO some of the tightest trees on the mountain. That's why I put it in that category.
As for power line, it's not steep and there's plenty of long bump runs in the East that are steeper. Yeah, the terrain is varied, but not enough to make it challenging whatsoever.
Have you skied Why Not at Stratton? it's a solid 35+ degree slope for a solid 4 or 5 turns before a mandatory 15 foot cliff. Short, yes, but IMO a lot more challenging than a standard steep trail like Expo @ Tremblant. A lot of those runs are steep and wide, some shorter than others, and pretty interchangable with other trails in the East that are in honorable mentions or are not even mentioned in the honorable mentions (Westway @ Hunter is a pretty similar trail to Expo @ Tremblant for example).
I've skied the Madonna liftline, IMO the castlerock liftline at sugarbush is harder. I've also skied Tuckermans and neither is even close to the level that Tuckermans is on.
I can see your argument about Expo.
Don't hate on Blazer's, everyone severely underrates it. Yes, its short but it packs a punch. It's just as short as Why Not at Stratton. More often than not the entrance is a mandatory air drop. I've seen people try the drop, fall and roll all the way down to the bottom of the run, yard sale and take the hike of shame on the flat-out. I've also seen someone attempt the drop, land it and then climb back up because the rest of the trail is either too narrow, too steep etc. It's a very comparable run to Slide 2. You were talking about how short runs like Why Not, shouldn't be judged based off length, yet you said that Tuckerman's Chute and Blazer's are too high because they're really short.
K27 isn't that short.
I've already stated my case for Powerline. It's pretty much a less steep version of Tramline at Cannon. It's got the rocks, the cliffs, the jumps that Tramline has. Doing the whole run is a grind and a half. Don't believe me? Ski it yourself.
Liftline is only groomed on the skiers far left side for the idiots who try it and regret it.