I thought her borrowing Tiny's feathers was obvious enough as Neutral Special, though her Up Special would be her Helicopter Spin. Personally speaking, I don't buy the idea of her being unique from Diddy because of having an additional arm because, if you implement Diddy's tail in just a few more moves, you can say the exact same thing about him.
In general, discussing the potential cloniness of a character isn't a bad thing; the current semi-clones seem to resemble their original counterparts because it makes sense for them to, the Spacies having access to similar technology, for example, Link being a touch faster as his younger self, and the Mario Bros. being, well, bros. I interpret it as part of the alleged "charm" Sakurai implements into rosters on the whole.