This season is fine so far. With these shows that try to keep you guessing it's typically all in the payoff anyway. Especially if you have normal cast/acting and not exceptional like in season 1.
Game of Thrones made a run out of it. Seasons that were solid but somewhat meandering and convoluted but the last 2 episodes would hit you like a brick and you were left thinking the whole thing was great. Then seasons 7 and 8 came and they couldn't keep that magic streak going and it tanked the perception of those seasons.
There's 2 problems I see with this season right now. First is they've crossed the line of excess of hinting at supernatural events but still being able to pull back and have it be supernatural free but not seem stupid. I can't imagine a way to pull that off at this point. If that's what they try it will fail to land.
2nd is there are too many one note characters. It's fine to have Navarro be one note but to this point they haven't developed much depth with Danvers, Hank, Peter, or Leah. They've developed more depth with the dead girl through flashbacks than they have the main characters. Episode 4 would be a great time to really ramp up the emotional response in the viewer before hitting us with the conclusion to the story.
It feels like this is going to revolve around the environmental factors of the mine and whatever works Tsalal was doing vs the health crisis and outrage of the community. Danvers' daughter is going to get in too deep and be a source of conflict for Danvers, and I wouldn't be surprised if it's revealed Annie was using Clark get access to Tsalal and that eventually got her killed.