I've written my basic points here. There's much more than this though, this is just the skeleton.
I have to note that, I would like for Viktor to end up as a good guy in the end. And if I understood correctly, you'd like to see him end up as a villain, a true machine. What we do agree on, is that we want a character on a crossroads. Someone who went through such a trauma that it changed his perception of the world. And the overall story should practically never reach the end, so neither of us would theoretically see our end! Then we are free to agree on everything regarding the story!
The new Viktor's bio sounds like it was rewritten, or had many things edited in. Pididly, for example. It doesn't feel like an organic whole. And frankly, it bluntly tells us "well guys, Viktor's a saint. See, he saved 10000000 people." But the story doesn't show us anything. It doesn't show us his emotional reactions to his deeds, instead, it paints Viktor as a boring, almost savant-type who doesn't care about his surroundings. He only cares how "human errors are everywhere. Ugh". What? And by giving him this mindset even before a tragedy and depression, it erases any significance his transformation had. Now it feels like he was a bored weirdo, and is still a bored weirdo, who at one point said "oh I had a depression for a week" and put on a purple coat with sparkles. And now he wears it as he wears his "transformed body and mind". Bleh.
The short story seems like it could belong on a line slightly after the crossroads, but tilting towards the evil side. Viktor directly tampers with a child's brain. That's a no-no. And he offers the kid a glass of milk, too bad he didn't smile and show a thousand pointly teeth with that as well, ha! So I guess i know why you like the short story :P I would have wished for something still on **exactly **that damn crossroads.
To conclude, the new lore is - all over the place. Fails to understand Viktor as a character and his psychology. Tells, but doesn't show anything. Lacks emotional impact and above all, logic. Focuses on "emotions are human weakness" and pushes this to an uncanny valley of evil "cure". As if. As if our own damn world isn't moving in this direction. And prosthetics and deep brain implants certainly aren't viewed as evil in the real world. So I don't understand the choice here. It's like the writers weren't even acquainted with this technology.
But hey! Viktor got called a saint! Everyone's happy so let's praise the writers. Nobody cares about legitimate analysis of a character.