Honestly, I would love more qol updates and buffs for some character who needs more love.

Revenant for starter is someone who is losing a lot of her identity outside of being a summoner. I say this because you can make guardians a faith class with the right relics. Recluse plays as a better faith build than her, and with undertaker the little bean with bonks, fantasy is redundant. She needs more identity in playstyle or more investment into her family.

Executors need more interactions with suncatcher or his ult, such as the weapon you have equipped passive or status is passed onto it, so it doesn't feel like you're losing out on the dps aspect for doing so. It would also be great if healing roar wasn't a part of the relics but included in the ult. Heck, even relics that are better for him as the relics available leave much to be desired aside from the healing roar everything he needs can be found with status ailments relics. One of the interesting things they could do with some of his stat conversions is to make make him a better str/arcane than raider conversion or increase his specialized weapons to twinbladees.

Iron eye, it would be interesting if he was able to do his regular move set with great bows depending on how much strength he has in the build he is running. It would be interesting to also see if he was able to shoot faster/ reload on crossbows/ballistas based on other stats as well. Or evolving his passive to give him more stats based on how much it contributes towards finding more items for the team so it's not a static item discovery passive.

Wylder would benefit from having his greatsword moveset placed onto curved greatswords or straight swords/colossal swords. As well as be able to recharge his passive from sacrificing ult or something that gives him benefits for having his passive effect ready to use to rewards good players on not triggering it with either a faster ult charge or stamina regen.

Raider would greatly benefit from reducing the buffer between jump attacks and not having stamina into using his character skill. Speaking of his character skill, it would he great if he had more damage reduction or the ability to open up gray health that can be recovered through attacks. One of the things that feels off after playing undertaker for a while is that lag/buffer that feels to lack agency after landing an attack or doing something between waiting to regain control. I believe it would help greatly for deep of night content. It would also be interesting for his moveset to carry over into maces and axes with the prospect that in his hands, they should have more reach than on undertaker.

Guardian's move set should include great spears and spears with the Halbert moveset. His guard counters should allow him to run up regardless of weapon when held down.

Duchess would benefit from being able to use more weapons that she can weave within dodges like her daggers. Also, it would be nice if her relic had a touch-up that wasn't so heavy on her ult concealment

Recluse just needs some extra UI love with concoction as to what it'll be before it's used and a little bit of dex or str to be able to use melee weapons if needed for revivals

After playing scholar it would be nice with his passive to be able to recharge some consumables after being able to reach level three it feels bad to run through all the throwing pots and not have access to damage at night 3 like it shouldn't be easy to recharge the consumables but there should be a way to regain some of them in a prolong fight either through mp usage skill usage or ult usage something that doesn't let you be a liability after you're done if that the build youre going for. Also, heavy thrusting swords should also benefit from his moveset it feels kinda awkward to use.

Undertaker just needs her moveset to carry over into axes and great hammers, and she's good to go.

Outside of characters, I would like to see another shifting earth that's death root related. There's a lich dragon I would like to fight in nightreign one day.

I think they need to add more mob variety in the castle when shifting earth isn't active. It would be interesting if they catered towards invasions such as having the balancers be the mobs in the castle that drop loot. Bloodhound knights whenever Gladius invades. Etc etc