1) For unrated newcomers, I mostly agree. I'm not quite sure that we need to rate the Non-Specific Action figure, though, and I think there are others (Jill Dozer and Mr. Resetti) that had roles in Brawl that we should rate. Also, the whole Midna thing is kind of questionable; I did a bad job of introducing her day. Some people considered us to be rating her solo, while some considered it to be any form of Midna.Question time. Are there still characters left worth rating who can actually get a decent score? The answer is yes, but most people aren't nominating them. and by decent score, I don't expect any of the characters I'm about to list to get in. buuuuut most are definitely in the possible Assist Trophy range and light years better than questionable nominees like Omastar, Yarne/Owain/Random Fire Emblem character X, Count Bleck, Chancellor Cole, Chef Kawasaki, and Athena Freaking Cykes. I'm not saying we shouldn't have fun nominating guys like those whatsoever. Most of those "stupid" days were a lot of fun. but there are mildly better characters to rate than any of these for those who think there aren't.
Here are some examples of characters who can do better than 1 or 2%:
Prince Fluff (Kirby)
Midna & Wolf Link (as opposed to solo Midna)
Birdo (Mario Bros.)
Mallo (Pushmo/Pullblox if you live in Europe... this one is coming soon)
King Hippo (Punch-Out!!)
Kalas (Baten Kaitos)
Alex (Golden Sun)
Felix (Golden Sun) (both solid AT material if Isaac were playable)
Petey Piranha (Mario Bros.)
Black Knight (aka Zelgius) (Fire Emblem)
Caeda (aka Sheeda) (Fire Emblem)
Tempo (HarmoKnight)
Bubbles (Clu Clu Land)
Urban Champion (Urban Champion)
Non-Specific Action Figure
Third parties who don't have a chance but are very noteworthy and/or Nintendo relevant:
Ryu Hayabusa (Ninja Gaiden)
Jill Valentine (Resident Evil)
Leon S. Kennedy (Resident Evil)
Dr. Eggman/Robotnik (Sonic the Hedgehog)
Crono (Chrono Trigger)
Tiz Arrior (Bravely Default)
Neku Sakuraba (The World Ends with You) (we rated him as a team, let's do it solo)
Viewtiful Joe (Viewtiful Joe)
Maxwell (Scribblenauts)
Conker (Conker) (we did Banjo-Kazooie... let's do it for the want score)
AND for rerates, here are those, overrated and underrated in my opinion who can use a boost or reduction:
OVERRATED:
Bandanna Freaking Waddle Dee is the #1 most notorious offender.
Impa
Zoroark
Mach Rider probably a few percent
Porky and Masked Man
Daitoryo
Karate Joe
Genesect, Sylveon, and maybe Blaziken (he would definitely be reasonable with a new PT)
Doctor Kawashima
UNDERRATED:
Ghirahim and Captain Rainbow (both getting second chances soon)
Chrom, and a Chrom and Lucina Team
Wonder Red and Bayonetta (maybe a couple percent each, moreso Wonder Red)
I also think Andy is worth rerating with Advance Wars coming on the GBA VC. I don't know enough to tell you if I find it overrated, underrated, or spot-on, but I can't wait to try out the biggest Nintendo series I've never played.
2) I can't really think of any other third parties. Heck, you even acknowledged that the ones you mentioned don't have any chance.
3) I agree that Waddle Dee, Daitoryo, and Karate Joe are egregious over ratings. Karate Joe is explainable by the fact that he was presented (by me and to me) as the end-all Rhythm Heaven choice, the guy who would be in from the series if it got a character. I think he'd lose some major points in a rerate, but fan support will keep the others high. I agree also that Zoroark is overrated, but I rated him too low in the past. He deserves less than what He has, but more than what I gave him.
I'd also classify most of our Top Ten as overrated, but that's just me.
4) Ghirahim, I agree, is underrated. I have him at 15% and that's low if anything. Chrom is also underrated, but not by much; I need to update my FE projections before I can make a statement.