Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
In watching a "dark" game such as Small Espionage, the pieces are obviously hidden from observers while the game is in progress. But it wouldn't be giving anything away to have the two players differentiated, perhaps by colouring the question marks differently. An observer could then at least tell who has the most pieces.