The point Shado is trying to make is that HAT can be used for utility, making him a good last pick for the crew list. Think of it in terms of Yugioh (because I know **** well 90% of you ****ers have played it.)
You can't play at a competitive level without a side deck. Well... the side deck is usually 2-3 copies of 5-7 cards, no? Let's translate that into Brawl: who here can confidently claim they play 5-7 different characters in tourney?
I'm not saying people can't play different characters. But let's be honest, when's the last time you've played a character other than your main/secondary in tourney? Probably never. HAT, whether for his indifference, stupidity or his noticeable signs of ADD (<3) can use MK, DK, D3, Snake, ZSS, Kirby and Wario effectively... and chooses to switch on a **** whim, not because of a bad MU.
I can't think of anyone other than NL who can claim that. Hat literally is the Magical Hats card in MD/VA, and no other can attest to this feat.
As for the crew battle rules, I'm pretty sure you send in the player only and they announce their character from there. I could be wrong (Tant, fix me on this.) You also can only switch if they choose to stage counterpick you instead of go random on neutrals.
With this said, if Hat goes D3 (which he doesn't have to, his Snake is up to par) and they attempt to stage counterpick, he can easily switch characters. Although if they put in a MK main, MK ***** D3 with no timer and gayness at full capacity. So... again, Hat is for utility only.
I would also have to say denying Junebug a spot on the crew list is the most idiotic and ignorant choice you could make. Honestly? Not only has his skill been proven, but for god's sake you're going to deny a high-level Lucario main in a crew battle? Lucario's character design was built for crews. There are fewer scenarios where sending in June would be a bad idea compared to being a good one. You'd be showing clear favoritism towards another player to not include June.
I would place June on the list over Hat. But I would drop Forte for Hat as well (nothing against Forte.) The reasoning being Hat can use MK almost as effectively as Forte, while bringing more to the table because of his other characters.
Final List (in order of importance... IMO)
1) Candy
2) Omni
3) Meep
4) Neo
5) Junebug
6) Chudat
7) Boss
8) PS
And for Utility:
9) Hat
10) G-reg
Why G-reg over Forte/Azen? Forte is a great MK, but there are better MKs out there, not to mention everyone knows the MK MU. And since now it's only MD/VA, it's not too hard to tell what the MK playstyle/metagame is like here. Azen is a great player, but when he's out of practice, it really does show. And not only would he have to start practicing now, but he would need to learn a bunch of MUs (because believe it or not, things do change in Brawl) or he will get ****ed just like in the circuit finals. Finally, G-reg plays Snake and Jiggly... Snake is a beast in crews and Jiggly can play as a wild card if they do not know the MU.
If Azen can truly step it up and show it (in upcoming tournaments), then sub him for Junebug. Otherwise, there is no reason whatsoever to include him over June.
As for why I haven't mentioned Takeover, he's a great player but can be a tad inconsistent which very slightly tips the scales in G-reg's favor. I'm not being bias here (he's my crew mate after all.) I would advise G-reg over Takeover if you're looking for a 2nd Snake.
And unless people skyrocket in power levels within the next month, I don't see this list changing.