My ideal changes for Robin:
- Extend the reach of Robin's grab (around something comparable to Mario), improve the horrendous start-up, and decrease the whiffing lag. Keep roll-cancels.
- Enough hitstun on down-throw for legitimate follow-ups.
- Short-hopped neutral-air should auto-cancel. Make an ostensibly safe approach an actually safe approach!
- Speaking of short-hops, make it a little shorter? Make short-hopped Levin aerials a legit thing!
And... y'know, that's fine. I'm actually really satisfied with Robin (stupid grab aside), so I actually wouldn't really buff or nerf anything about him/her. Above things would be nice to have but as it stands, they just feel right.
Palutena, on the other hand...
- Forward tilt and down tilt should come out much faster and return much faster. The disjoint is nice, but the start-up and endlag is insufferable. It's incredibly easy to get punished for using it. The long-lasting hitbox is kind of pointless, I'd rather the staff come out, hit someone, and come back.
- Forward-air should be meatier. Do more damage or hitstun or something. F-air is nice and reliable as it stands, but it's kind of unsatisfying to land as it's pretty much a 'death of a thousand cuts' thing, and Palutena doesn't really have the endurance for that.
- Everything out of Jump Glide should auto-cancel. All of Palutena's air moves are pretty good, so give me more reasons to use them all the time!
- Auto-Reticle should target invincibility frames, and the projectiles should move a little faster. Damage and all that is fine, just make it harder for Little Mac to run up and sucker punch you.
- I think the Up-Smash needs to have a more indicative hitbox of the actual effect. As in, it should be wider. I don't mind a nerf in killing power if it means that someone can't clip the edge of the beam and air-dodge through.
- Counter needs to not suck. It doesn't even have to be a good Counter. Just a more reliable option.
- Make Palutena's back-throw a kill throw. Make Palutena's grab reward even stronger!
- While we're getting unrealistic, the major change I'd make to Explosive Flame is letting you move the 'spark' indicating where it's about to fire left or right in the brief start-up. I think it'd improve the utility of the move quite a bit, and let you punish rolls on a solid read.
I don't really have issues with the rest of her stuff. Forward Smash has a lot of start-up, but it's a fantastic kill move and it's got enough kill power to make up for how easy it is to see coming. Down-Smash isn't great, but it's got huge range and can punish rolls reasonably well. All of Palutena's air moves, up-air and back-air especially, are great.