D'oh!
I posted the patch without the units directory; I will post a corrected version ASAP.
-Disease should
not affect Europeans, except from Marsh and Jungle.
-Docks are intended to create pioneers; I'm testing it to see if it slows player expansion and 'helps' the AI by making settlers available conventionally.
-Natives are intended to expand quick, and I originally meant for their settlers to be available from the start as it is now; but their cities should all be little measly 1-pop villages that are easily destroyable. It is designed to force the player into either taking land by cultural conversion or taking it by military conquest. This is not a period of peaceful expansion by European powers (although some, like France and Portugal, could very well accomplish this for this mod).
-Basically I wanted to crank up the difficulty and 'realism' a couple notches, so you don't have Dutch colonies in the Great Plains before 1600. If I had a bigger map, you'd have a little more elbow room.
I will:
-Decrease the rate of disease for marsh and jungle.
-Consider giving the AI one extra settler on higher levels instead of several extra servants
-Decrease pop cost of European Settlers, for the AI's sake.