alanback: I don't get your point, IMHO the post-Crawford doubling strategy is a lot simpler than that. As the leader wins absolutely nothing of the game being doubled, the trailer should systematically offer double at move one, the double should be accepted (otherwise the trailer will do the same in the next game having gained one more point inbetween). Then the game is just like a cubeless game, except that it will count twice.
The only exception I could think about is when the trailer needs an even number of points to win the game and he gets a good first roll. Then the leader could decline the double just in that game, hoping to get a better start in all the remaining games.
Or is there another exception ?