Cabin crew at stations is a good call to enable CC to be aware you are in control.
However, it could also already put them into mindset that an evacuation may not be required.
For any situation where an evacuation may be required, it would be a distraction for flight crew prior to completing any checklists, therefore a no go area.
For any situation where an evacuation may not be required, it would be advantageous to let cabin crew know this using this command. It then enables them to initiate communication with flight crew, who can answer when able, and ensure flight crew are provided additional information they cannot see from their positions. An evacuation may still be required afterwards, but not based on flight deck information. rather additional information unknown to the flight crew at the time.