I don’t think the queen was treated as a command structure to the borg until Voyager. Her portrayal in First Contact seemed to me to be essentially the same as Locutus in best of both worlds. Not an individual, not in charge, but the avatar for communication that was the entire collective.

The one part that I will agree with you would be that she was much more willing to talk than previous portrayals which was compelling for the movie but did water down some of the aspects of the borg’s characterization you mention

DATA: Who are you?
BORG QUEEN (OC): I am the Borg.
DATA: That is a contradiction. The Borg have a collective consciousness. There are no individuals.
(the Borg Queen's head and shoulders descend from the ceiling)
BORG QUEEN: I am the beginning, the end, the one who is many.
(the head and shoulders lock into a cybernetic body and the Queen approaches Data)
BORG QUEEN: I am the Borg.
DATA: Greetings. I am curious, do you control the Borg collective?
BORG QUEEN: You imply disparity where none exists. I am the collective.