It was reported elsewhere by several passengers that Barbara M and her husband were vacationing aboard the March 23rd Silver Cloud 12-day expedition voyage in Africa, so the leadership change may have been decided some time ago but the announcement held until after her return.
The tidbit of information that @Lonedaddy shared above about Silversea's new brand President, coupled with a new VP of Transformation who used to be in charge on on-board revenue at RCL certainly indicate that a new leadership team that is highly focused on driving revenue and cutting costs is being assembled. Not unusual following an acquisition; I think we had all just hoped otherwise when their earlier moves post-acquisition were significant investments in new ships plus Barbara's promotion.
From the press release:
Notably, he was chief operating officer for the Group’s former luxury cruise line, Azamara, delivering the line’s most profitable year while it was part of the Royal Caribbean family of brands