1. More shieldstun and hitstun in general, nerf rolling and airdodging (will never happen, but I can dream). At this point, the game is way too slow, campy, and defensive for my tastes.
2. Buff Palutena; make her Ftilt and Utilt not complete garbage, less windup time and more range on DSmash (so that it can actually punish rolls), make USmash's hitbox last a little longer, and more knockback on FSmash and DSmash. Also, maybe turn Uthrow into a kill throw? This will make Palutena more capable, even in her default moveset. Currently, without custom moves, she really struggles to keep up with the likes of hyper-offensive, mobile brawlers like Captain Falcon, Sonic, Sheik, Little Mac, Fox, etc. IMO, that's what's really holding her back in competitive play.
3. Buff Zelda; give her at least 1 kill throw and make her Smash Attacks into kill moves. Farore's Wind and her lighning kicks are not enough kill options to make her an effective fighter in my eyes. Plus, Zelda is in desperate need of a good approach, imo. I think that Sakurai really needs to take a leaf out of Project M's book in terms of balancing Zelda.
4. Buff Lucina and give her some more differences from Marth. Maybe make her faster, and more range to make up for the lack of a sweetspot? Also, add more damage/knockback to Marth/Lucina's moves in general.
5. Buff Bowser Jr./Koopalings. I don't care how, but buff them. I really wanted to regularly use Lemmy, but I can't find any ways to use him effectively as he is now.
Highly doubt these will happen, but I can always hope.