AlliumCepa: You are right, it is completely compatible with cubed matches. Indeed, it should be implemented a scoring system, not a tournament system.
Now as Thad pointed out, the half point for a loss is not very natural and it would look better and be completely equivalent to have loss = 0, single = 1, gammon = 3, backgammon = 5. But I propose even better : single = 1, gammon and backgammon = 3. Simpler, closer to normal backgammon, and counting backgammons has always been quite irrelevant anyway, it occurs so rarely that it count for virtually nothing in the equity calculations, except in the 2-3 last moves of some games.
As a scoring system and not a tournament system, I support it.