Bruno Faidutti has written his thoughts about the merits of designing rules simply and with particular clarity:
The essence of a game is in its rulebook Ã¢â‚¬â€œ the rules of the game are autonomous, complete, finite and known by all players. This may even be what makes games different from most other human activities, whose rules are never as autonomous, as complete, as finite and as clear, which may explain why the latter are often more burdensome and frustrating than the former. This game rules set is virtual, and is the fundamental creation, half literary and half logical, of the gameÃ¢â‚¬â„¢s author. It has to be explained to the gamers as fast, clearly and completely as possible. The main way to do this is the written rules set. LetÃ¢â‚¬â„¢s talk now only of this written rulebook, or at least rule sheet.
read the rest of his editorial here if you wish