Small update on this, I actually just discovered more story I was not aware of prior. I don't do datamining unless it's for convenient access to ingame text (as you can't copy paste in the game).
Turns out Hestia's vote was discarded as she is no longer of Olympus, and Hades' vote got discarded because he sent it by letter. Which means the trial was, generally, rigged by Athena. Asterion is innocent, the court is not. So disregard my point about it not making sense, with Asterion being punished anyway.