As for replacing DL64 with Norfair, I disagree, unless you mean just for starters sake. Granted, it could be due to Joe lieing to us all, but using his tool, Norfair looks to be a medium stage with a ever so slightly shorter ceiling then Battlefield. All edit this post in a bit with different groupings of stage types.
*edit* Here we go. These are just the first 2 rows.
Super Small (S):
Yoshi's Story
WarioWare
Smallish (S+):
Green Hill Zone
Fountain of Dreams
Medium (M):
Yoshi's Island
Smashville
Battlefield
Lylat Cruise (L-?)
Norfair (L-?)
Largeish (L-):
Final Destination (M?)
PS2
Skyworld
Distant Planet
Large (L):
Dreamland
That line between M and L- is fairly narrow. Lylat and Norfair's main stage should probably put them in L-, but their blastzones kind of keep them in M. Final Destination is actually also on that edge as well. I feel all of the other spots are self explanatory, but it is worth noting FoD is also on the border. If you just get rid of the individual categories, the list works out to be much nicer. I still think that if you want Dreamland completely banned, it would only work if Skyworld replaces it (I would have both personally and get rid of Distant Planet, seeing how similar it is to PS2).
My most realistic stage list would probably be this:
GHZ, Battlefield, Smashville, PS2, Skyworld // WarioWare, FoD, LC, FD, Dreamland.
Thats my best shot at a tier list. I still think any list that doesn't have Skyworld and Dreamland is screwing over floaties. Think about it, in the proposed list, where would any floaty counterpick characters like Fox or Pikachu with great vertical kill power? Fox would ban Dreamland and FD, the only 2 remaining large stages are great fox stages (Distant Planet being the fairer one, but still). Maybe they would counterpick to FoD or GHZ, but I just don't see how Skyworld is an abuseable campy stage, but Battlefield isn't (seeing as Skyworld has a lower top platfom than battlefield). Even then, Dreamland has an even higher top platform, and that is being considered legal. I just think its silly. At your next local, any campy character, abuse top platform camping or find good videos showing it. I would like to see it in effect. I already have a couple examples in mind, one being from melee, but someone show me how bad it can be.