The lots and world seem to be broken as Sims will wander into your house and stuff to get around and swim on your property as well if you use WW then you get Sims banging in your house.
I think that the Sulani is supposed to be a "one big family" type of world, so sims will come into and around your house like they live there. I had an event where a sim asked me to celebrate their birthday
(I think the exact wording was "Do you want to come to my Birthday Party?") and the party was held at my house.
I do think that the update is a little lackluster. I think this would've been a good time to introduce resorts just like in TS3. This doesn't really
feel like an EP, more like a GP. It also feels empty. There's not enough lots at all. It's just the Bar, the Beach, and the conservation site, das it. Where's the restaurants and shops? No option to have a local do your hair or something?