I'm glad to know you liked Mary's dress, Boris. Now that I have seen clear pictures of Maxima's gown for the second night, it has the same sort of lovely shoulder line secured by an invisible upper bodice. So does Letizia's gown for the Investiture, but with a defined neckline.
I think I know what you mean about the Queen's Investiture gown, but she wore it with such elegant dignity that it seemed utterly regal to me. I liked it very much in spite of its being in one of my least favorite colors. The blue was striking on her, and adjacent to the mantle it seemed quite symbolic. Perhaps the Dutch should consider a mantle for a queen consort. The long blue cape seemed almost a mantle.