Update 03/03/2020: Another bounty!
If it wasn't clear by now: More than one apology has been issued by the company, they could issue another dozen and it wouldn't make a blind bit of difference. Monica Cellio, Josh Heyer (aka Shog9), Robert Cartaino and Jon Ericson have been permanently demodded, abruptly fired, or fled the burning building, respectively. No amount of apologising will bring any of them back. The company should ask them to come back, but it will not happen.
The OP admits the likelihood of Cellio returning to Stack Exchange if the company issued a more heartfelt apology is remote.
Of course the immediate reaction will be "we can't say any more for legal reasons". But I'm sure that you could, by mutual consent, vary the agreement you have with her to allow you to post a real apology, even though it's likely too late to bring her back to the network.
But the truth is, the company has already apologized, several times. Emphasis in bold, mine.
I will make it up to you, I promise to
An apology by the recently appointed, Chief Product Officer, Teresa Dietrich
I want to personally apologize for our actions or inactions, as the case may be, in the past that had a negative impact on our relationship.
@Teresa Dietrich February 19, 2020
By @Shog9, former Community Manager and Stack Overflow employee
Believe me, I know how stressful this is to watch, especially when so little is being said. There's a lot I want to say right now, but it would be careless of me to do so; and again, we've already been a bit too careless with what we've said in some situations, and hurt folks by doing so.
@Shog9October 15, 2019
The following apology was by David Fullerton♦, CTO of Stack Overflow, Inc., and VP of Engineering since 2012
In the last few weeks, we made a series of mistakes, both in our actions and in the ways that we communicated those actions. […] and I’m deeply sorry for the hurt that we’ve caused.
First of all, we hurt members of our LGBTQ+ community […]
I am responsible for that, and I am deeply sorry.
…we also acted at a time which coincided with a Jewish holiday which she and many other members of our community observe, and we should have taken that more into account in the process.
I’m responsible for that, and I’m sorry.
Third, we hurt the moderators and members of our communities. […] I’m responsible for that as well, and I’m sorry for the hurt that we’ve caused.
@David Fullerton♦ October 6, 2019
However, the first official apology to the community was posted just three days earlier; entitled
An Update to our Community and an Apology
It was then deleted by its author, @Sara Chipps♦, on December 23, 2019.
Posting a link or citing excerpts of deleted content carries the penalty of suspension. And after having served a one month suspension for this very offense, I could be suspended for a year. However, I believe, citing just the title of any deleted post is not punishable
Words without actions
Another apology at this stage, sincere or not, would be insulting unless it was accompanied by an offer to reinstate Monica Cellio, without trial, as a moderator.
A possible compromise could be limiting the reinstatement on those sites where Cellio was democratically elected. This would, consequently, deny her moderator privileges where she was appointed for example, on MSE.
But in my opinion, that golden opportunity to really amend and include restitution for the hurt and wrongs inflicted collapsed when an agreement was settled between the two parties. Furthermore, if we cast our mind back to the official announcement, dated December 23, 2019, the term "regret" was used twice:
While our initial statement did not address her specifically, we regret that we used her name when responding to a reporter's follow-up. We regret any damage to Ms. Cellio's reputation and any other damage she may have suffered.
A regret is also a synonym for contrition and remorse. It implies the speaker or organisation expresses shame for something they have done or failed to do. Fundamentally, "we regret" is a formal way of saying "we are sorry".
From Merriam-Webster dictionary
2: to be very sorry for
- regrets his mistakes
Whether these "regrets" and repeated "apologies" are sincere acts of contrition is an entirely different matter. One thing is sure though, there are no victors in this mess.