- The microgames aren't level 2 difficulty on Dancing Team and Potluck Gang, those are remixes and the microgames were level 2 difficulty on previous Warioware games on the remixes.
- On past Warioware titles...after you completed a stage, you can revisit the stage again to go for a high score but this time you will encounter different microgames you haven't played before, while in Warioware Gold, you will encounter some different microgames you haven't seen or played yet after you try again that first time or many times on that stage you haven't completed yet. This also does it to challenges mode and the remixes which makes microgames easier to unlock than on past Warioware games.
- There are no new vocal songs.
Things missing in Warioware Gold:
- Thread starter TRKMC
- Start date
I agree with what you said about the mix-up stages, but all the boss stages are on level 3, so I guess it kinda makes up for it? Although yes, I would've preferred the usual everything starts on level 2 deal. I loved the Sound Studio in Smooth Moves, and I seriously wish they had brought it back for this game, since I love all the remixed microgame music! I also wish Jump Forever was in this game.
admiralblowhard
SALT AND PEPPER CHIPS
i'm glad someone said sound studio. i wish that was in every warioware tbh
unpopular opinion, but i really wanted a mike stage. what we got of him was good, but pretty minimal. maybe make it an optional postgame stage so you don't have to play it if you don't want to
A new vocal song is what I missed too. Every game from Mega Microgame$ and onward had one, but I missed this in Gold.
As for the Sound Studio, that's something I like too, but I didn't really miss it, since we had option to listen the collectable records in good sound quality in the gallery anyway, but it's indeed a pity that there no sound FX option.
I only just realized it, but we never got a high quality version of Crygor's Bathroom Jam from WW Inc. 
We got records of all the other WWInc songs, but not this one.
There's a very short snippet in one of the MPG cutscenes, but that's not nearly the full song.
Goddamnit... Why didn't Mega Party Game$ just add that song as another bonus? They had Drifting Away and Four Seasons, but not Crygor's song. Same with WW Gold.
Why does that one always get left out?
We got records of all the other WWInc songs, but not this one.
There's a very short snippet in one of the MPG cutscenes, but that's not nearly the full song.
Goddamnit... Why didn't Mega Party Game$ just add that song as another bonus? They had Drifting Away and Four Seasons, but not Crygor's song. Same with WW Gold.
Why does that one always get left out?