Doesn't mean much. Each 3 games had pretty different "art style" when it comes to characters and they all sold more or less the same.
I'm pretty sure Monolithsoft will just do what they think is good for their projects (as long as they have freedom) and that's it.
I guess the chara design of Xenoblade 2 is kinda common, but compared to people who dislike Rex's outfit, I actually like it a lot, because it's closely tied to the story.
A good thing would be that his "full" suit or even another type, just to have a second choice, could be available for people who are not fan, but beside that...
Anyway, Xeno 2's number is most certainly hindered by th lack of stock for both the console and the game I think.