I think we can also agree that in Galactic Civilizations is inferior to Master of Orion in the sense that Master of Orion has features that Galactic Civilizations does not. That Galactic Civilizations has features Master of Orion does not is irrelevant.
By the same token, the concepts and features that Demigod has that DotA does not are also irrelevant. The only thing that matters are the things Dota has...
And Sins of a Solar Empire is an abject failure for the obvious reason that Homeworld has some features that Sins of a Solar Empire has.
That's why games like Galactic Civilizations and Sins of a Solar Empire were subject abject failures both critically and commercially (I mean, has anyone even heard of those games? I highly doubt it, they suck). That is why Demigod will go down that same path to utter failure.
Those who do not learn from history are doomed to repeat it.