I was excited to hear of a television show adaptation of The Mist. It's a concept that focuses mostly on characters and good writing, rather than a strong narrative and series of events.
The Mist is a story that provides the characters with an enormous threat that engulfs everything in its path like a thick fog, with terrifying creatures lurking within it, but that isn't the biggest threat.
People. People are the biggest threat in a world where morals and laws go out of the window; those with unorthodox agendas and beliefs are the ones that will ultimately lead to a character's demise, and that was displayed in the film adaptation of The Mist. We saw characters turn on others are they believed they were responsible for the strange happenings that have reduced them to a state of waiting for either help or death to arrive.
The television show appeared to have completely ignored that, and it felt as if the writers had constructed all the right characters to make conflict work, but never really introduced any conflict, instead we saw a plethora of annoying characters that leads to the viewer rooting for the mist.
There was potential in having characters turn on each other in all these terrible ways, as our group of main characters attempts to survive and avoid these people that have lost all humanity, but it seems the writers opted for focusing on the threats in the mist and connecting them to several potential narratives and explanations, along with various, completely unnecessary horror elements. The show almost felt like a type of fan-fiction: a version of the story in the eyes of a 'what if?' fan that wants to create and explore their own threats to be associated with the mist.
I don't recommend watching the television show of The Mist, it doesn't particularly pull you in with anything interesting; characters, agendas, narrative elements. None of them really stick. If you're looking for something that is more horror-esque and has good writing, watch The Strain.