In this game the current base speed of a ship of the line is, "fast" while in reality, ships of the line were slow, lumbering ships. I suggest that this speed be changed to reflect that, as a frigate should definitely command more speed. The speed of a ship of the line should at least be marked as "Slow."

This has been discussed before. While you are correct, SoL tweaking is something we do not want to do for a series of important reasons. In general, ship tweaking of widely used battle ships falls into the same category.