Permanent dirt spots, dead spots where trees or bushes don't grow, PWPs always being too close to something (especially when placing bridges), brushing away paths when you are trying to pick up an item, and villagers plopping their house wherever they feel like it.
OMG RIGHT?! At least in New Leaf, there was no such thing as grass wear and there were set zones where villagers could move. I HATE that they can just plop down anywhere and erase months of hard work breeding, growing and placing paths.
And I definitely love the friendship bracelet idea. I have lost two of my favorite villagers now because they packed up without ever giving me ANY indication they wanted to leave, and even though I speak to every single villager every day, none of them told me "so and so is thinking about moving" etc. I don't have the slightest clue why Nintendo is so bone-headed as to make it so that once they're packed up, it's already the point of no return. Screw that! I lost my precious Julian! ;;
What the heck were they THINKING?!