He can only really use that to prevent criminal investigations on his own personal actions if they can be considered to be under the umbrella of being an "official act."
Other members of his admin aren't protected.
Yet. They are not protected yet. Do you think the current Supreme Court would allow for the conviction of someone doing what as ordered by a president that has immunity for official acts?
I think the first case to the Supreme Court will see this happen. If Trump’s official acts are immune from prosecution, those following those “lawful” orders will likely skate away with no prosecution or punishment.
And that just pisses me off. I’m stocking up on torches and pitchforks.