Agreed. I think Kylo Ren, aka Ben Solo, is just as central to the story as Rey is, or how Luke or Anakin were in their own trilogies. Even if his last name is Solo, he is the grandson of Anakin Skywalker. And like you said, Leia is just as much of a Skywalker as Luke is, and she will still be around in Episode IX (so will Luke apparently).

I understand why you don’t like how it is officially being called the Skywalker Saga, but honestly it is the perfect name for it. Lucasfilm has to consider the continued longevity of the Star Wars brand, so the saga they are about to wrap up can’t just be called “The Star Wars Saga”. We may get new movie series that will be even bigger than the Sequel Trilogy has been. Who knows? Really, all current and future movies will be a part of this never ending tapestry of the Star Wars Saga. Episodes 1-9, though, deal specifically with the Skywalker family, so calling it that is fairly reasonable. The Star Wars brand name has to remain pretty open, because eventually it will be tied to other stories and characters beyond the Skywalkers, if they hope for the franchise to endure.

Ironically, I think one of the first drafts uses the term “Saga 1” or “The First Saga”. I think these three trilogies will forever be the “First Star Wars Saga”, but as a Star Wars fan, I hope the franchise can grow beyond that and explore new and interesting corners of the galaxy with brand new characters we can fall in love with.