my some ideas on changing these champions listed (wall of rambling text I'm tired)

specifically I picked them due to a very binary and/or simple nature or a lot of reliance on point and cilck in their kits.

I'll be honest I dread her level 6, she's not as bad as she was when she got passive spellvamp and was super tanky as well as having a lot of damage if she snowballed but she's still quite obnoxious to peel. some ideas are give her ult not 3 but only one charge, and reward her for properly setting off her q with a reset but a far longer normal cooldown (works for diana, why not?) so she has to play around, and have her other skills also proc the q mark for extra effects but also losing the mobility ult (yes even shroud could cause some kind of blinding or slowing effect) I wouldn't mind her being compensated with a far lower q cooldown and resetting like 90% of the ult cooldown so there's still a dash delay and she can use her other skills in the meantime.

love the champ, hate the kit. she's obnoxious early game and useless late. her q reset is really nice but her e and w make her the ultimate stat checking duelist and her ult is lil flippy ninja pool floaties. since she's a duelist I was thinking have her ult focus around isolating one target to force people to expend resources on them. not asking to bring poppy's old ult back in lord knows we don't want that, but a form of debuffing her target in a way that just placing it on could strike fear into them. something like "massively reduced healing on the target, armor shred and/or %of damage done as extra true damage" as well as increasing her tenacity or something.

dunno if she wants to be a mid or support so I'll suggest something for both. support kayle is somewhat there but doesn't really feel like a "guardian angel" in most cases. her q needs many changes as it's just boring. I see it working as a charge sort of like varus where she visibly rises into the air (maybe even reveals herself in bushes) and throws a javelin of light at an enemy, spearing and slowing them. and rooting and doing extra damage to them if she or an ally (or just an ally) attacks them. her heal should not only be a blessing but an allied empower, granting extra auto attack range for a duration and perhaps something extra like some extra damage or life on hit in an aoe. I don't see much reason for her e now if we allow her to apply her heals buffs to herself so it could be replaced with a semi long range ally targeted dash. the ult could stand to be less brain dead but at least it's a small thing in a better kit.

for a vengeance kayle her ult would be some form of dash or execute, I wish I could say give her galio's ult and bring back the old galio but we won't be getting that, she could keep her q spear, I quite like that idea, and her e could stay, why not, I would however update it to rather than a small aoe to a cone of a certain length and about 100 degrees in front of her. say after the reach of her sword the cone begins but if you can get in there she has a bit less damage on you. I wish I could think of something more exciting for her w than a heal but perhaps it could be a watered down version of her current ult in the form of a self shielding or damage reduction. also remove thine runaan's interaction since she's full melee now.

oh boy. out of all of them I think xin is the worst, he's just so binary. his dash and ult are alright, they mark one target down and blast everyone else away while he chews them up. I'd like if he could sweep his spear more, perhaps it could be his q that sweeps in a cone extended that slows enemies rather than his dash and rather than a 3 hit passive, a triple cast with the third being in a circle that heals and knocks up. being the brash man that he is, his w could be a battle cry that grants him some defensive buffs or debuffs enemies around him save for his marked foe so they have a harder time getting to the ally to help.

I don't actually mind most of his kit, he's got an anivia thing going on where his e helps him land his w. however he's far too safe in the lane for someone so strong late, giving him incentive to duel enemies was a good start but I'd go a step further and only allow him to gather ap after committing several skills to the trade. say a 3 hit passive nah... stacks of evil generated over time. one minion kill grants one charge that can be dispatched on a champion kill or assist entirely. or used up slower on simply damaging enemy champions. charges don't have to be 1 ap as that would bring veigar back down to his old ap grind but maybe get better as the game goes on. also that ult could stand to be changed. rather than an execute of "bye bye health" it could be the final part of his combo. say stick it on an enemy and when it finally pops they recieve magic damage based on missing health and how many skills veigar landed on them at the time.

I dislike many several things about this champion, I like to hate on how much damage he can just vomit on somebody and how hard he can carry some games with a good ult, but thinking about it I wouldn't change much about his kit besides taking away some damage and giving him some more utility. his auto reset could have a longer extra range and knock up enemies slightly upon hit, his base damages could be bumped up a bit and scalings knocked down or some converted in to lower total ad scalings so he could pick up a sterak's and be a better team initiator though not as tanky as a tank and not as much damage as he had before.

his bombs are nice, hard to hit under pressure and great delayed utility. however his e just makes that piss easy if the enemy doesn't burn summoners. simple fix, have the speed and slow ramp up to their current max with subsequent applications refreshing the duration at current slow, because he gets double nasus withers and I find that somewhat obnoxious with nasus who only has one.