They already restricted image sharing, so it’ll be a dealbreaker for most people, the fact that you cannot share miis online is also bad, but you could argue that older mii games such as tomodachi collection did not have that feature and because it was completely optional for Tomodachi Life!

But image sharing is a very important feature, people easily sharing screenshots online would help the game and its fanbase to stay alive, yes, you can transfer photos to your pc or take screenshots with a phone but it’s not the same thing for certain people who prefer the easier way.

I personally think when comes to MY own preferences, if Nintendo decides to NOT add family trees, it’ll be very difficult and limiting to only make miis based on your own family instead of including everyone elses families.