YES! BRING BACK THE SHOPPING CARD!!
I also like the idea about being able to choose your skin color, not everyone is white.
I would also like it if each villager had their own specific personality. All Smug villagers basically act the same exact way. For example, Lucky could always be talking about being a mummy?
Also, making signs a PWP (where villagers are designated to move into) would be AWESOME.
Onto my ideas, if there is an Animal Crossing for the WiiU, I would love it if multiple people from the same village could play at the same time! Makes sense to me as there are 4 villagers and 4 possible players. I'd just rather be able to play multiplayer without having to go with separate towns.
One thing I REALLY want is the ability to directly change the clothing of Villagers. When they have that ugly clothing on, it's really unappealing to look at them at all. You could be like, "Try this on" and they change clothes, you say they look WONDERFUL, and they wear that shirt!