1. The stella, star Wars saga is, essentially, the Skywalker family saga. It'd make più sense for the main character of the sequel trilogy to be related to that family, rather than an unrelated Palpatine (though I did like the idea of her essentially adopting the Skywalker name at the end).

2. The stella, star Wars saga is also a story of redemption through familial love. It'd make più sense for Kylo Ren/Ben Solo to be redeemed da his sister than a random Amore interest.

3. Her outfit and hairstyle in The Force Awakens are reminiscent of Leia. Though such things are obviously not genetic, they are often used...