Well, the first season is very much Roddenberry's baby. Doing what Roddenberry 'always wanted to do' -- to borrow the man's own words. So they were trying to grope around searching for an equilibrium that would make it workable within the tight boundaries of the Roddenberry "vision", a "vision" somewhat retrospectively arrived at and a vision that restricts where you can go with the storytelling. The writing team was also just ad-hoc and unstructured.. The result is alot of very wobbly, sometimes very preachy stuff trying to agree some sort of conception as to what a 24th century utopia would look and sound like. As Roddenberry himself declined in influence, these features also receded.