Calling it now, Riot is going to make Kayle completely morally reprehensible
It is the easy path to making every edgy wannabe philosopher on the internet think you have written an amazing character story. Excessive flaws flanderized to the extreme, "the light is really dark" trope, the unjust Justice stereotype, usually some overly orderly but backwards person who has a bunch of discrimination against everything, but not as a soft characterization flaw but rather as an absolute and utter extreme pushed over the edge to make the character completely morally reprehensible and hateable.
Riot will probably make sure, with their fairly predictable writing recently, that Morgana looks like as much of a freedom fighter and innocent victim as possible. Well Kayle looks like a tyrannical piece of shit with no redeeming values.
I'd love to be proven wrong since I like both characters and would like to see them both have more depth than that. But I highly doubt it.