Documentation Major Flaw for CoW

A real major problem for people is that there is a terrible record of having documentation of the rules/functions of the game.

For example:

How is a player to know when planning that a high level airfield reduces the refuel time, or that in the 1.5 version a level 1 airfactory is slower to refuel than a level 1 airfield?

In the description of the item this information should be present and if they had a true player rule book it should be there as well.