“[Limestone in FL] is up to 75’ above the current sea level. Ergo, the oceans will likely rise another 75’ ...”
Maybe that’s because the land mass has risen, not because the sea level has fallen.
If all the polar ice caps were to melt, sea level would rise about 225’. So, it is conceivable. The rise and fall of sea level is what drives the rhythmic bedded nature of the sedimentary rocks you observe in road cuts and such.
FL is tectonically dormant. The land ‘rose’ due to the accumulation of shells in the shallow sea millions of years ago. The shells are above sea level in FL because the present land was under water millions of years ago. The accumulation of ice lowered the sea level below the shells exposing them as the present day land of the Florida peninsula.