I respect your opinion but I personally think that Savannah and Isla are lovely names, I'm particularly warmed to Isla. Also, I'm going off-topic here but Savannah and Isla will never become Queen unless something terrible happens (which I doubt it will), so I think HM just let them "pick and choose" as it wouldn't really matter whether their name was royal or not.
Whilst I agree that Leonore and it's variants have been a little overused by the Royals, I still think it's a pretty name, but isn't what I expected at all - perhaps the Swedish Royals will start a tradition of surprising us. Lilian wasn't a surprise however and neither was Maria, but they're nice names nonetheless and I like how they continued the O'Neill Maria tradition. This is just a guess but perhaps little Leonore is named after Queen Ulrika Eleonora, as her name is a variant. It's interesting to note that Prince Constantijn and Princess Laurentien of the Netherland's daughter (Countess Leonore of Orange-Nassau) shares the same name and spelling, could this mean that Leonore is the Dutch variant? Moving on to her title; I still think its strange how Leonore received one and a Duchy, when Chris has none. Also is Estelle's Duchy (Ostergotland) linked to Gotland? I'm not an expert in Swedish - I have very basic knowledge of the language - but I think Oster might mean East, which would mean that Estelle is the Duchess of East Gotland if so.
Princess Leonore is a very sweet baby and already looks like the Bernadottes IMO. I love her blankets, too - she will need to wrap up warm in the cold weather that New York is experiencing at the moment! I hope we get a photo of her and Estelle together, that would be a cuteness overload.
Leonore already has her own Wikipedia page (but I think little George in Britain holds the record as he had a page before he was born!
):
Princess Leonore, Duchess of Gotland - Wikipedia, the free encyclopedia