Kassadin's new lore: retcon or expansion?

I just read Kassadin's new lore, and now I'm seriously worried that the Riot story team have no idea what made him interesting, and are on the verge of permanently ruining his entire character. But it's hard to say, because the new lore ends before Kassadin enters the Void.

What I loved about the original lore was that Kassadin was the only one to ever glimpse the Void without fully succumbing to it. His brief foray into the Void did, however, twist his body and mind, so that he was now something more than human, burdened with terrible knowledge, and in need of special implants and apparatus to stem the corruption of his body. But he nevertheless retained enough humanity to understand that the Void needed to be destroyed.

This lore was attractive because it created a unique sense of tragedy around Kassadin; he had witnessed the true horror that lies beyond this world, but he'd never be able to make anyone else understand, because only he had seen it, and it was beyond words. The best he could do was use his own twisted appearance to show people the horrific effects of the Void in the hope that they would help him beat it.

Reading the new lore, however, there is no sign of any of this nuance. Instead, we've got a generic revenge story. Many have compared the new Kassadin to Liam Neeson's character in Taken, and I have to say, this doesn't seem too far off.

However, the one ray of hope for me is that the new lore ends before Kassadin has entered the Void. So I'd like to ask Riot, will Kassadin at least retain his old lore here? Will he still be tricked into entering the Void by Malzahar? Will his foray in the Void still twist him into a bio-mechanical monstrosity wrestling to keep hold of its humanity? I hope so, as these aspects of the lore are what give Kassadin his uniqueness, pathos, and gravitas.

There is, of course, still the controversy surrounding Kassadin's daughter, Kai'sa, to consider. How, if a brief trespass into the Void completely screwed up Kassadin, was a little girl with no special powers able to live her entire life in the Void with no negative effects? The answer we've been given by Riot - that Kaisa is just exceptionally strong - just doesn't cut it.

Personally, I think Kai'sa's current skin should just be an illusion that she creates in order to draw unsuspecting human prey towards her. Her true form should be released as a skin, one that shows her as a tentacled monstrosity that keeps asking Kassadin, through a chorus of pulsating mouths, "Daddy, how could you let them do this to me?"

And if Riot doesn't have the balls to do something like that, then I at least hope they can clarify that Kai'sa never actually entered the Void, but merely lived outside one of its mouths, because experiencing the Void without surrendering to it should be an achievement reserved for only one character in the game - her father.