Regarding the debate on Ella being evil or not, I get the feeling that the whole point of how WW frames her is that we don't really know for sure. On the surface her actions are undoutably evil and immoral, but as the deeper plot is revealed we start to question the whole basis on how we frame that decision, the weight of one life agains many lives, human life compared to superhumans or even immortals, and the value of the life of a stranger over that of a friend. There have been plenty of hint that HERO unchecked would lead to a dystopia.
The MC can go down a more moral or corrupt route and get different experiences as a result and with only 1 playthrough I dont know how much that affects the scenes in the game.
I know that my opinion of Ella shifts regularly between 'kill her now' and 'does she really know some deeper truth that evades the rest of us?' and all the while I am unsure if she is right or wrong or if I am simply being swayed by my dick.