The hat is too Cat in the Hat for me. I like her dress, not the jacket or hat. She seems lovely.
Lol, now I can't get Cat in the Hat out of my consciousness

I do think if Louise had her "own" hat, I mean one made for her, similar in style to Sophie's perhaps? - her ensemble would have been raised up a notch. I do like the pattern of her dress.
I usually appreciate a rewear but for
this occasion I would've gone "new". And new doesn't have to be attention-getting or extravagant. If Sophie had worn a plain pink suit with no pattern I think she'd have knocked it out of the park. Pink is a great color for her.