As a community liaison type person, it would be very detrimental to say anything other than what she did. "I loved my job, I loved the people, I will miss you all". That level of restraint and professionalism, especially given such a high-profile departure, will server her very well for future employers, or clients if she goes solo.
She may not be able to say due to an NDA or something of that nature. This might be all of the silence-breaking she's allowed to do.
As a community liaison type person, it would be very detrimental to say anything other than what she did. "I loved my job, I loved the people, I will miss you all". That level of restraint and professionalism, especially given such a high-profile departure, will server her very well for future employers, or clients if she goes solo.