I have level 5 kayle, got most of the mastery playing her jungle actually. I think shes really fun but i think she is overdue for a rework.
What i imagine kayle as, Is a Holy Justicar/Executioner (Poppy's ascetic is the Holy judge) opinion and i like her melee/ranged mix. So i think she should be a trasnform champion like Kayn.
--At level 6 or some passive thing or whatever she can choose to land on the ground and fight with her sword and righteous flames as an AP bruiser.
--Or she can remain in the air and become a ranged offensive support type using holy fire for damage and CC, and healing magic, her ult in this form would be the Invulnerability Bubble WoW paladins holy justicar But with some kind of easy mechanic like a placement or unique skillshot.
Before transforming i really dont know, id say just keep it as is but that would be to lazy.
I have an idea for pretty much one ability so far and that is for her bruiser form. She has a big radius with a point and click circle with a 180° degree slash at the front that she jumps (fly's) to, dealing small damge with the circle itself and big damge if you land the slash, if you land the slash in the center of it you will also stab forward (think sejuani).
As melee auto attacks would be simple slashes and stabs (maybe a 3 hit passive?)
As ranged she'd shoot fireballs with her hands and fire slices or something from her sword
What i think is a shame is that she is tied down a little because of her lore ties with Morgana. They won't give Kayle a BIG rework (weather its like mine or not) and leave her lore rival with a smaller one like the Katarina and Talon reworks. Maybe Morgana mains can think of cool stuff
Thats mostly what i think would be a great Kayle rework. If i come up with more abilities I'll try to remember to update this.
If you think its cool and have ideas for spells leave a reply with it.