Since this thread is also apparently for veteran moveset changes too, I'd like to put forward a few ideas about it, some I've mentioned on here before but others pretty new.
Now that she's free of Sheik, she should really embrace the defensive mage archetype she's themed around.
Her Ftilt and Utilt could create a slow moving crescent projectile in front and above her respectively (think Poison's projectile from Street Fighter). Give Ftilt less kill power and give both moves the same lag with the projectile reaching about Rosalina's Utilt range (but forwards for Ftilt) to balance them out.
Her Usmash could have a fiery explosion at the end of the multihit, similar to Uair. This is more of an aesthetic thing tbh but does add vertical range on the final hit.
Her Fair and Bair both being Lightning Kick, while iconic to Zelda, really hold her back. I'd say that Fair should be replaced by what Ftilt is now but in the air (without the projectile I mentioned earlier) but keep Bair the traditional Lightning Kick, so she has a quick aerial for damage and a kill aerial for variety.
Din's Fire is a good idea, but they went in the wrong direction by giving it pure kill power then balancing off of that when it really should be for tacking on damage and pestering from afar. It should keep the huge blind spot in front of Zelda but should activate much quicker and move much faster, as it can be used to punish people attempting to space from a certain distance. Remove the god awful idea of making her freefall after using it in the air too.
Phantom Slash should be able to be cancelled, that's all.
While her base moveset really isn't that bad by itself (not counting the horrible lag issues) I'd say Ftilt and dash attack should be switched, so that Ftilt could be a shield parry attack with the invincibility frames and the dash attack could be the multihit staff spin.
Instead of being the character with unique custom moves, Palutena could be the character with the first stance special. Up B and Side B can still be Warp and Reflect, Down B could be replaced with Celestial Firework, and B could be the completely new special Goddess Stance, which gives her access to her specials that were previously locked behind customs. Pressing B then pressing up lets her do Jump Glide, side lets her do Super Speed, Down lets her use Lightweight, and pressing B a second time lets her use Autoreticle. These moves could then be balanced accordingly but still giving her many more options in fights.
I'm not as familiar with Ganny as I am with the past 2 characters, but a small change I would like to see is simply giving him a hover for a run. It would still be a slow as his regular run right now, but would certainly suit his personality more to simply hover forwards with his arms crossed.
Dead Man's Volley is another thing I'd like to see replace Warlock Punch(I know it was mentioned quite a bit in the general discussion but I'm bringing it up here cause I like it), where he shoots a slow moving ball forwards that stuns but can be reflected by hitting it hard enough just like Dedede's Gordos. The ball moves slow enough for Ganondorf to be running closely behind it which can lead to mixups: the opponent can hit it back but Ganny follows up with a dash attack to hit it back again, they can shield it but get grabbed, Ganny can dodge it himself then punish accordingly, Side B and Down B could even be given the property to phase through the ball completely allowing even more mixups.
Due to who Jiggs is and why she's added, I don't ever expect that many changes, but all her specials have at least some use except for Rollout. One attack they could easily change that to is Dazzling Gleam, where it's a chargeable defensive attack where after it's fully charged, pressing B again will create a very large hitbox around Jiggs, blasting the opponent away.
No umbrella twirl for Utilt? Disrespectful.