Grey Meadow, the Industrial Hub

Okay, thank you for all of your help, Snapdragon. I think I have everything fixed except the tears on the beach house and the relationship problem. I used conform edges on the beach lot and I found no changes in the actual lot. I could only see said tears in the elevation from a far off perspective anyway, so I don't think that error should pose a major threat to the quality of the world. The only way I can see as to fixing the relationship error is to have everyone meet one another, which is way too tedious and not worth solving such an insignificant problem (it also makes it more difficult for me to save the world). Also, the problem with the strobe lights brought me to a solution with one of my tombs, where Sims could not backtrack properly because I placed fluorescent tubes above some of the doors, so I just killed two birds with one stone.

For your questions:
Some tombs are connected via dive well.
The hole in the marina is decorative, for the most part, but I also made it for quick transportation between lots if the players decide to name it (I also put a hole by the science lab).