I have also posted on the idea of a true floating city. The design as shown here helps a lot, but is also well within our present building envelope. Now imagine a simple tub that is large enough to hold everything you see here.
Size matters hugely because sheer size overcomes the absolute worst that the ocean can throw at you. I also allows you to build fifteen and even thirty story sky scrapers along the perimeter in particular.
This is at least a design solution that makes the hull components pretty modest in terms of engineering effort. It should work in the Salish Sea. However, those inserts on the perimeter will channel thirty and forty foot waves and tear the whole thing apart rather easily. this will not pass insurance muster for the high seas and may well be a problem even in protected waters.
This is likely a good design for deep sea net systems in which the waves ride through the whole construction. The hinge system needs to be robust enough to maintain a safe separation as well. You see why i like big and bigger and long straight surfaces. There is a good reason drilling platforms are a hundred feet above the waves. Yet that is also good enough.