Yes :) it was just a recap of Evo Japan stuff, but Maimai has translated most of that on twitter already, plus they're gonna release a translation in a couple of days (and it would also take forever to translate all of that T^T )
In terms of her abandonment system, they explained it but I don't know video game/SC jargon in Japanese so unfortunately I don't have the vocab to understand it.
EDIT: Spoke to Maimai about it a bit, and they were being very vague about it, but something about how dodging or evading stuff builds meter and using meter will give access to more powerful moves or something like that
They said that she MIGHT be playable there. Which hopefully means that she will be, but they still added that maybe unfortunately lolNo gameplay at all.
As far as I understand, we'll see Amy gameplay on March 21st (10 days from now), since that's when Weapon Master tournament will happen hosted by Namco.
Also, Amy's SC4 costume is free to everyone, even if you don't have the season pass.