What's interesting is if it was one of the three characters you mentioned we as the audience would probably have very specific assumptions as to who they were talking about when telling Poe "I know your kind; impulsive, dangerous and exactly what we don't need right now."
If Ackbar said it we could assume he was saying "we don't need a crazy ROTJ Lando right now."
If Lando said it we could assume he meant "we don't need a crazy Han Solo right now."
And Mon Mothma would have us assuming she meant "we don't need a crazy Jyn Erso right now."
It definitely would have been cool to have that extra layer of context to the dialogue. That said I still am fine with Dern's portrayal of Holdo and the fact that she was a brand new character. But yeah it definitely would have been cool to see how it would have played with someone else as well.
I just watched the scene again where she knocks Poe down to size.
It's a scene you have to watch raw, casting aside the hate and the Youtube analyses that this represents the film's message that 'women should be in control because men are hot-headed and careless'.
You have to cast that aside because the film doesn't play out that way.
But what I still see is this strong feminist woman going overboard against the brash male "flyboy". It's a depiction of toxic feminity vs. toxic masculinity, but I don't see that as the film's message. Instead, it's just one conflict among many that the characters have to overcome. It resolves itself through Holdo's sacrifice, just as Luke resolves his inner conflict through sacrifice.
If the film was asserting an anti-male position why was Rey sent to bring Luke back with the aim of restoring the Jedi Order?
Rather, what we have is likely Kennedy's feminism guiding the empowerment of women in the story in order to bring about equality. But the film didn't do it well enough to impart that message to the casual viewer. It can come over as one-sided, whereas the film can be seen as representing different kinds (waves?) of feminism, before finally reaching a balance.
I refer to that balance as
meritocracy because it goes against the positive discrimination that would put a person (male or female of any race) into a position purely to satisfy that a set number of males or females of any race had been reached, regardless of their talent.