Honestly, I've always liked the MotW shows and hated the mythology arcs. They were always so damn confusing.
I liked them for the most part and to me they sort of made sense but I think that all changed in the episode with the spaceship that was crashed in the ocean off the shores of Africa. I think that might have been when I lost interest. Then you had the super soliders thing which didn't make much sense to me but I do think it made for a kind of fun little arc within that season. In many ways I sometimes think it might have been better to make the mythology stories more about government corruption and secret societies and keep the aliens as the mystery built grey aliens, and we have no clue on their motivations because I think that is how most people think about so called real aliens in the real world. Once you start making them actual characters with plans and so forth you loose some of the realism about how our society see's aliens that some think are real and in the real world.
Jason