I just not a fan of the Cape style high neck dresses- gowns I think everything else looks perfect. She looks confident, poised and lovely.
Also as a woman with a large chest, I think that us "full figured girls' look better, or more flattering in a square or rounded neck. Even here, the high cut of the gown makes it appears She needs a more structured Bra.
I've seen the same on Camilla, Maxima, Mette Maritt, and even Sophie. Needing with the " cut ", to have better support . Again, just a personal opinion.
High neck dresses -gowns work, or flow better with woman's with smaller chests.