I have, rather fortunately or unfortunately, never watched The Newsroom precisely because people said it was too preachy and Sorkin unchecked. Accordingly, I don't know if I can comment on the quality of the show but based on what people have told me I believe the problem with the show isn't that it is preachy but because it is too "on the nose" or "in your face" and not written as well or elegantly as say The West Wing was.
To be honest, The Newsroom tainted The West Wing for me, so I haven't been able to go back. But when science fiction is now The Walking Dead and The Leftovers, where the drama is character based instead of plot based, I just don't think you can have "issue" episodes and hoped to be taken seriously.
Well, unless you are going for cheese/camp like the CW shows I suppose.
I disagree. I watched the Drumhead last week and that episode is just as relevant, if not more so today. The reason why indirect stories about aliens are compelling is the same reason why we use metaphors and analogies in the first place. If done well, it makes things easier to understand when it's from another perspective.
Ex Machina is basically an updated Drumhead, and it's fine. But the question is can you make a series like that, where every other episode is some unsubtle allegory?
The other mode of Star Trek is the wacky scifi anomaly of the week - like the crew gets their memory wiped, or they get trapped in a time loop and end up meeting their own grand kids or whatever. I suppose you could churn those types of gimmick episodes, but you're more likely to end up with shows where Tuvok and Neelix merge into one person or where Janeway and Paris turn into space slugs and have sex with each other.
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Someone brought it up in another thread, but the new Minority Report is what I'm afraid a new Star Trek show would turn into. They need to divorce themselves from that kind of science fiction writing altogether.