Some honest thoughts on Eve's bio
I'm not a fan of the changes. They're not bad, persay, but I feel they're... lesser.
The short version is that I feel a hired assassin that feeds on her victims' pain has more story opportunities than a lust demon who specifically goes after happy people. If you're gonna heavily alter lore you should make the thing better. But making her an outright demon like this takes away a major component of her character.
The thing I liked about the old Eve was that she was... for lack of a better term, human-but-not-quite. She was clearly some form of supernatural entity, but the exact nature of it was unclear, and she also was human enough to engage in dialogue in person (see her old color story). She worked for contracts and got paid, though it was unclear why precisely she worked like she did or what she got paid in. It left her open to interpretation (Killing was her job, pain/seduction was her hobby.) The human element is completely gone in this new version, and I don't see why. You could easily have kept her hired assassin persona and expanded on her by adding the need to feed on pain/misery.
Other thoughts:
Why was she born from the Rune Wars (i get why in-universe, i mean from a meta perspective)? Is Ryze going to be her main antagonist now in a Batman/Poison Ivy sorta deal? (That doesn't sound too bad, actually...)
If she could feed off of the misery and anguish from the entirety of the Rune Wars, why does she need to lure people in now? Why can't she feed off of the depressed people she saw in her hunting grounds by walking past them?
The glob of shadow she started as. Where did that come from? We never get an origin story for Tahm Kench, just his name. But here with Eve we KNOW she was a shadowy, primordial thing before she became Eve. It takes away from the air of mystery and myth that makes Tahm work as a world-building element, not JUST a character. This is how Bilgewater interprets the demon known as the River King; what part of the world interprets Eve as... well, Eve? It sounds kind of like a Demacian thing (especially given Vayne's backstory) but it's unclear.
Rambling now. Thoughts?