I'd be sad in Ankha moved out... I cycled through 16 villagers to bring her back into my town before the update happened (though I have her amiibo card now so that might not be an issue anymore).
Likely a character I don't have a card for? I'd be sad in Shep decided to move on... he's one of...
As above, Japanese set is totally random. I would also just buy single cards if that's all you're looking for.
I feel lucky that I managed to snag a UK set when they were still available!
Man, I love having two consoles! I've got the new 3DS with the Pokemon plates, and a 3DS XL I use to villager transfer (my old console). I had friends ask why I needed two, and I'm just thinking WHY NOT. Haters gonna hate.