The very worlds are a missed opportunity. B.Bay has fishing boats, so why can't a sim participate in an offshore fishing trip? Not to rain on the Maxis parade, but this is the only way to catch tuna, as they cannot be found in ponds, streams, or off a pier.
Strangerville has a motel, diner, and gas station along the main highway. These should not be abandoned as between highway travelers and the place being a military town there will be adequate business. TS4 still does not have functioning cars, but the station should still be active (if only in the San Myshuno sense). Sims should be able to get a meal at the diner and a room for the night at the motel. Both would be a great help for non-resident sims working on the local mystery.
Britechester has an abandoned castle. Why can't that be explored? All sorts of possibilities there, including archaeology.
Speaking of archaeology, Selvadoria has more potential sites than the ones we are given, such as: market area, seaport (shown on map), various levels of housing, farms, workshops. I could go on, but you get the idea. Too much set dressing, too little for sims to go to, see, and do.