This is a very good point. I've often wondered about a safe and secure method of getting my important passwords to a family member in the unfortunate event that something should happen to me.
That said, I'm very sorry to hear about your brother-in-law.
I really like Splatoon, but absolutely hate the motion controls for aiming, so this might be really nice. Also, Switch owners can still play Splatoon. Those without a Switch (or those who don't like the Switch very much), can have something to play now. Seems like a good thing to me.