DUNE commits two crimes against the Bene Tleilaxu. Although the game does include the main strength of the BT, the ghola, it does not permit the ghola to be subverted, i.e. become a traitor. Anyone who has read the books will remember the primary ghola, Duncan Idaho, and the turmoil he went through. Thus the whole substance of the ghola is gone. The game's second crime is its exclusion of the BT influence upon the protagonists.
Much spice travels to the spice bank in payment for reviving tokens and leaders.
The profit is there, but the influence that should follow this is absent. The BT are as much the grand manipulators as the Bene Gesserit. They should be in the game as characters. Now they are. The following rules add a seventh character to DUNE, the Bene Tleilaxu without disrupting the balance of the game or changing its rule.