If they had made Holdo a secret FO plant in the Resistance, would anything in her actions (save the suicide run) need to change? This is why she sucks.100% agree ont his, want to add another reason why in military hierarchies its very, very important your orders and reasoning are understood by your lower level commanders: Because you might die. and someone might have to take over.
If the entire Pussy-Power Resistance leadership had been wiped out, no one would know there was a plan, let alone how to execute it.
Of course for drama reasons I'm fine with Holdo, or any other fictional commander, playing secret squirrel games. The issue I have with Holdo is, as discussed, her plan didn't NEED to be secret - nothing was gained. Hell, given the size of the Resistance fleet, if you were worried your comms were tapped you could have just sent runners to deliver the message to the captains. She also kept it secret when there were very serious reasons TO communicate it AKA stopping a mutiny.