Esther 1:16, Question 3. Why does Memuchan switch Achashverosh’s “Malka Vashti” (1:15) to “Vashti Hamalka?”

According to the Malbim, Memuchan switches Vashti’s name and position in order to devalue her royal status. After all, Memuchan would argue, she is a queen, but anyone can be queen.