Regarding the last issue raised in that closed thread, sea level rise, it isn?t uniform at all, due to the complexities of gravitation, coriolis effects, centrifugal forces, thermal expansion differences, prevailing current and wind effects some parts of the world experience much higher rises in sea level than others.
i.e. the sea level does not rise uniformly at all like a lake would when water is added to it.
Then there is the added complexity of vertical continental plate movement which can also add or subtract from sea level rises over time.