I've been saying that here ever since we knew 8-player was a thing.
Off-hand, I think the following normal stages are tame enough:
Stage list
There are probably others slipping my mind, but most normal stages seem more manageable than not. The main "crazy" ones are 75M, Gamer, Norfair, Pyrosphere, Gaur Plains, and Dr. Wily's Castle... Just thinking offhand here.
EDIT: Oh, and apparently Pokémon Stadium 2 is in the game!
I was talking about the new stages so I'll just address those.
Battlefield is fine
Big Battlefield is too big
Final Destination is fine
I haven't seen much of Mushroom Kingdom U but I thought it had some pretty intrusive hazards.
I'm waiting to judge Mario Galaxy until I play on it. There's too much about the gravity gimmick that we don't know.
We haven't seen nearly enough of Mario Circuit yet to make a judgement call either way.
I'm cautiously optimistic about Jungle Hijinx.
Skyloft is good.
Orbital Gate Assault hinges on how intrusive the missiles are. I really hope they're not too bad because the stage looks fantastic.
Coliseum is too big
Kalos Pokemon League looks like the Fountain of Dreams from hell.
Wrecking Crew has too many levels.
The platforms that rise you up off screen in Wii Fit Studio look annoying.
Miiverse looks way too bland, and it won't even be available on the release date.
Wuhu Island seems to be an autoscroller.
Pilotwings is cool
Pac-Land is an autoscroller
Does Windy Hill Zone use the same gravity effects as the Galaxy stage?
Town and City looks cool.
The above are my opinions on the new stages you listed. An example of something I would consider to be an amazing stage would be Magicant without the flying men.