What will be heard?
Vilna Gaon: That the king can do by himself, in his entire kingdom, even what pertains to him.
Malbim: The king's word will be done in his entire kingdom, even without the officers' counsel.
What is the meaning of "Ki Rabah Hi"?
Vilna Gaon: This is a great matter, that fear of the king will be greater on them, since he can judge by himself. Hashem arranged in order that Achashverosh will be able to hang Haman. Without this enactment, he would have needed all the Sarim to agree.
Did he enact that all women honor their husbands?
Vilna Gaon, Malbim: No. Rather, via taking his vengeance on Vashti, women will honor their husbands.
What do we learn from "lemi'Gadol v'Ad Katan"?
Vilna Gaon, Malbim: Whether his lineage is greater than his wife's, or less than hers, like [Memuchan].