I was all pumped up when the maid jumped in, but then she kinda just stood there? She showed guts insulting the prince to his face, but it was the king who did all the legwork on this one, and that wasn't super satisfying. Maybe the author felt that the hyper-competent maid gimmick is overplayed, but I wanted something a bit more substantial than her standing up and saying "What about this [commonly known and easily verifiable fact], huh?" when the king comes along a minute later to deliver the real kicker.
Even then, if the maid isn't here to be all-knowing and badass, give me a moment where the maid passionately extols her mistress' virtues in all the ways only a lover would recognise, or the noble lady fiercely coming to her maid's defence when the prince disregards her words as a mere servant. Something more personal between them, y'know? I can see yuri potential between them, but not much yuri energy. Wanted a bit more from it.