I guess it was her show so if any character should get the stand out base, it should probably be the title character. I too would prefer uniformity but I’ll take a good diorama base any day. This is like a half hearted attempt at a dio base with it mostly just upsetting the uniformity of the other figure stands.Round or curved ones do take up less space. I still like the classic black oval stands as they can be interlinked when you want figures standing close to each other in a group.
What I don't like about the tall round Ahsoka one is that it's designed more for promoting a single figure, rather than group display. She's going to stand higher as well as stand out from her companions on their uniformly rectangular stands.