Decisions big or small require discourse. That discourse should happen during the decision-making process in a room with designated key decision-makers. General announcement of the decision or the intended execution and effect of said decision should display alignment. Transparent communication is an important piece of many inclusive workplace cultures. Transparency requires alignment to be successful. Internal communication is most effective when it’s shared from a place of alignment, thus allowing and encouraging the fostering of alignment throughout the organization on a given decision.
(my "i can't wait to disagree in private" face)