It's not half baked because it indicates something you don't want to believe.
And I made sure to even paste out the typeset of the raw so anyone can in fact immediately research and verify it. Feel free.
And what licensed product does it contradict? Viz?
I don't see how, the context's the same where Shiryu concludes Saori and Shaka awakened the 8th sense in response to Dohko explaining that it emerges at death.
Even the official spanish:
"Por eso" which literally means something equivalent to "therefore" "that's why" "per that." I'm failing to see any tangible contradiction.
So now it's about to go from Shaka never died in the first place to he died and it was contradicted or? Man..
Already explained why it's a stretch to call a contradiction off the cloth alone, and even if the cloth were really an unexplainable plothole, that's not enough of a contradiction to say him dying altogether was retconned or whatever you're trying to insinuate, considering that his and Saori's entire existence in the Underworld along with Dohko's explanation of the 8th sense and how to resist Hades' laws involves going there alive after awakening the 8th sense, which is done by doing it at the moment of... death. That was never retconned or contradicted.
Shaka was not a soul in the Underworld pre Wailing Wall alive with a body, and that takes place after he was completely dusted prior. In this case the usage of semantics is perfectly valid, since alive and dead aren't remotely synonymous or usable to define each other. Saint Seiya's no different.
That's not the case for Athena who now can only periodically reincarnate as a regular human newborn baby with a new different body years after dying, on her own she can't resurrect in the way the 8th sense let her. Her body vanished because she went to the Underworld, her corpse was already shown prior before Saga wrapped it in the blanket, she literally fatally slits her throat and falls to the ground on panel.