Well, other than the part about "the only reason I or anyone would prefer minus to other mods" I agree with Other Aether. I play/get mods that I think other people will enjoy (some competitive people I know I stick to Melee and PM and try to play Brawl with the few that like it, with the casuals I know at school it's Brawl/Brawl Minus) because I enjoy Smash in general (I have a Smash 64 emulator on my Wii and laptop when I want to play that). But I guess this is a personal thing, and most people play it because it's fun to be able to recover from practically anywhere on screen.
MK: I sort of want dair's knockback growth powered up a little or base knockback powered up - his gimping game with it used to be absurd, now it's just okay (only slightly better than Brawl in my opinion). I want him to gimp better.
Lucario: Since multi-hit fsmash had zero SDI, that was a nerf. The loss of stun was mainly to prevent silliness (I once did a ~150% combo at like 60% as Lucario thanks to that stun - repeatedly just barely missing force palms to force palm proper to dair tech chase to some more missed force palms to fsmash - it was ridiculous). The dtilt KOd at like 150%, but Lucario fsmash should still KO around that range if he has any real percent on him, and he's also still go utilt -> Extremespeed -> uair to KO at lowish Lucario percents when they're that high anyway. I think the changes were good.
Sheik: Never played a good one. Only really heard positive feedback from others, and since I heard her damage-racking is silly (I know her roll is literally the best in the game, at least unless you can tell which way she rolls before she poofs), these sound like good things to do [I played a decent Sheik once, fair was really strong but so was 1.00 Lucario so I won].
Lucas & Ness: not sure how Lucas was changed, I checked and it was just a few small buffs so I think it's fine, I know Ness's change was just no batmode and no darkness on uair - no idea what the darkness did, and batmode was whatever for me.
Fox: He looks underwhelming when I play him, but the laser change is nice. I think if we ever get a real Melee vet (M2K, Mango, SFAT, Lucky, etc.) into the game we'll see he fits into Brawl Minus just fine.
Squirtle: seems fine I guess. Not sure. Maybe a little less startup on aerial down+b, but that's about all I can think of.
Charizard: Blast Burn might get nerfed [not that I want a nerf on it]. Stealth Rock + Blast Burn is hard for some to break through, though Falco, Fox, and Wolf honestly don't care.
Bowser: Like the change to RR dthrow. Don't know too much about other stuff, but I hated trying to tech it, especially in lag (never got the timing down really). Not getting grounded is nicer in my opinion.
Pikachu: Meteor cancel thing is meh, don't remember his other change. I don't love the meteor cancel change, but his recovery is strong so whatever.
Pit: Didn't know he was changed. When I checked it just said fair KOs better. Good for Pit, his KO moves aren't the greatest. So fine by me.
Game and Watch: Utilt change is good, Chef fix is nice, I wish the bucket wasn't nerfed (I always felt the point of the bucket was to KO if they put any projectiles in it, so that you fill it up w/ Chef and KO them).
Just my thoughts. Sorry for any typos - I'm pretty much typing in lag so I might have errors I missed.