Mazin wrote all the episodes so far, but Druckmann(and Halley Gross) write the last two episodes and Druckmann directs episode 6, which I believe will be the museum flashback. No one knows the source material like Neil, so I could see the final two episodes being quite good.
But yeah, I thought the pregnancy reveal was a little cheesy. I guess I don't care nearly as much about some of the other stuff, because I was not a huge fan of TLOU2 the game, and when they arrived at the theater was about the point where I started not digging it, so most of the stuff I forget was the middle portion of the game. I remember almost all of the beginning and end portions. But it was weird for her to go I'm pregnant and just lunge herself at Ellie. But I never cared much about that scene in the game to begin with so I guess I just don't care about it in the show either. I don't think spores are even going to be a thing in the show, but we'll see. I think it's too hard to write around.
Hopefully next episode they give us an update on Tommy. And I wonder if/when we're going to start seeing Abby flashbacks before season 3. Will they even show Lev this season I wonder. Reviews have said Abby is barely in the season, so I have a hunch if we see her again it may only be in one more episode. Probably the finale.