Adding Ahsoka to TCW made good sense. The other characters are forbidden to undergo any real growth or change because they're trapped between their portrayals in Episodes 2 and 3. So it's good storytelling to create an original lead character who's capable of evolving, whose future isn't already predetermined.
And Ahsoka has grown a great deal over the course of the series. In this season in particular, it's clear how much she's matured and gained in power and skill.
So no, she's not a Mary Sue by any valid definition. A Mary Sue is a character that satisfies only authorial ego and self-indulgence at the expense of story logic and audience appeal. Ahsoka's creation was solidly in service of good storytelling. And yes, she was made young to appeal to the target audience, but how in the world is it not a good idea? Deliver me from fans so short-sighted that think that it's a bad thing to bring in a larger audience for the thing they enjoy and want to see more of.
And Ahsoka has grown a great deal over the course of the series. In this season in particular, it's clear how much she's matured and gained in power and skill.
So no, she's not a Mary Sue by any valid definition. A Mary Sue is a character that satisfies only authorial ego and self-indulgence at the expense of story logic and audience appeal. Ahsoka's creation was solidly in service of good storytelling. And yes, she was made young to appeal to the target audience, but how in the world is it not a good idea? Deliver me from fans so short-sighted that think that it's a bad thing to bring in a larger audience for the thing they enjoy and want to see more of.