No, I was not going to finish this, although it would be tempting to try and see how backward I am when I encounter the other civs... Perhaps I'll keep the save to try it out later...
Kevin: Perhaps the seafaring civs need a 2nd UU, an early small boat able to carry a single unit and move really slowly... Although that would make them a bit more powerful than they already are with the extra movement for ships which already makes it easier for them to spread around...
BTW: The above is on a huge map, so the miniscule island is even worse than it would be on a regular world map...