Same as above, though I would place them above Antarctica.
The Bahamas. Too few islands.
Most of the islands are far too small to be placed on the map. I spent a couple months trying to fix this after doing the main revision, but it is simply improbable on the scale of this map.
I would put the Nile first on the list. The Eastern Desert is much too large and the bend between app. Luxor and Beni Suef too far south. In Sudan the bend running from app. Abri to Abu Hammed needs to be tightened while that between app. Ed Debba and Ed Damer should be widened.
After that I would place Mesopotamia. The flow of the Tigris and Euphrates on the map has almost no relation to their actual flow from the source all the way to the mouth.
Besides those the Jordan River in Israel/POT/Trans-Jordan (small but very important), a couple of vital rivers (especially for city placement) in the Andes, a number of very important rivers in southern Africa, the Chari and several others in central Africa, a number of major rivers in West Africa from Benin through to Ghana, the Senegal River, the Tiber in Italy (same as the Jordan), and numerous rivers in southern China.
Bascially, outside of Europe, we need a lot more rivers and for existing rivers to be fixed more than anything else right now.