I like the jumpsuit, agree that she could've worn it last night and it would've been great for the reception, but I don't hate it in this use either.
I'm also on the not-all-babies-are-cute train... He's definitely a mini Harry and he seems like a happy baby though! That instagram post of Arch meeting Archie is just
So disrespectful and tacky, not to mention the optics of hiding him in the UK only to use him as a prop when meeting someone famous in another country.