Today's announcement mentioned that Chii advancement is being worked on, while we got no words about other character revamps.
In my opinion Chii advancement doesn't really matter, an overpowered character gets a small buff and a new skin. She will stay overpowered, her overall gameplay won't develop, additional left click on moves, more dmg. What's the point of pushing the strongest character, absolutely nothing, right?
On the other side, Lilly players have been waiting for changes that save them from being part of the bottom 2 characters gang. Her moves would gain new purpose, her initial design flaws(pushing basic attack and SA break at the cost of cooldowns, damage and SF cost on skills) that has been plaguing her since beta would finally cease to exist.
I'm talking about Lilly revamp because the others either already got it or don't really need the changes as of now. Erwin is still abusing provoke, as we have still yet to get our brooch revamp. For Jin, nothing would save him from being the bottom of the barrel in PVE, the char is about pretending that SW has playable PVP.
Anyways, in my opinion, character revamps are much more important than some random placeholder character that can't even open most boxes and is still lacking most of the costumes others have. I understand that some people enjoy playing boring characters or a fat, filthy, oppai loli catgirl hits their fetish list, but I must ask everyone to be objective here and realize that Lilly's revamp should take absolute priority.