I think the Zuma GM is doing a fine job. I think the Zuma have several roles, and we, as players, can pick.
For example, someone recently tried to use the Zuma to destroy Terran. --use of Zuma as a weapon
And Terran was accused of trying to unite other realms against the Zuma--use of Zuma as a uniting force or crusade excuse (Manifest path comes to mind)
And the Zuma are willing to buy food for good prices--use of Zuma as a source of income
Don't like the Zuma? Move to the east, coward.
Poll