I'm quite a new AC fan only picking up an interest with the release of New Leaf, but I'm super excited at the idea of a Switch version of Animal Crossing! While the game format is great as it is, I do agree that there is room for improvement.
One thing I would appreciate is better control over the villagers that live in your town. There have been times when I've gone through periods of taking a break from AC only to pick up from where I last left off and to find that one or two of my favourite villagers have gone and moved away. While I get that's the general idea of cycling new villagers into your town, I'd like to have the option to have a definitive say on who you want to keep/let go from your town? Idk how it could be worked in but maybe having some sort of customized list that you can set a certain number of villagers as your favourite so they stay put in your town indefinitely. Maybe that's just me, but after losing a few of my favourite villagers over the past few months, that's a feature I'd definitely appreciate.