Well, there was a pic somewhat recently that Chisato posted online that had Asuna in it.
In that pic, Chisato censored out Asuna's face, which wouldn't be necessary if she were still in the company.
I'm more intrigued by the fact that Hiracchi is now officially out.
Makes you wonder when exactly it happened.
No surprise though. She wasn't exactly a perfect fit in the first place.
As for Runa... who knows?
It's not like they were doing things with the girl.
Hard to notice something's missing if its existence basically unnoticed to begin with.
Plus her nickname being close to Rina's was just confusing.
edit:
A new fanart of the current Eggs!