Vampires still break in. Locking doors will not stop them. I have only noticed a few kid messes lately and they have only been around playground equipment.
However there is a few new incredibly annoying things that have started happening with seasons. One is leaf piles. They are placed randomly in neighborhoods and they start to rot. They never go away. The second is coffee cups being left all over town. NPC sims will get a coffee and when the are done they set it on the ground and leave. They do not throw it in the trash. In fact, you can’t even clean them up yourself. They just stay there adding up...