While this looks fun and beautiful, what disappoints me is that it seems like almost entirely symmetrical gameplay. A large part of the universe and themes of Dune is differing cultures in a way that I don't think can be authentically expressed via a Terran/Zerg/Protoss faction system. For example, the Bene Gesserit operate as individual agents embedded into other factions.
Without even allusion to, say Fremen objectives not being to Harvest all the spice, I am skeptical