Perhaps they have hired more writers? They've grown a lot as a company and overall workflow / production is greatly impacted by the individuals involved. I've worked on projects where the addition or subtraction of one or two individuals made a huge difference for better or worse.
I don't think it's the writers, I think it's the game designers. The decision to spoonfeed exposition by clicking on an NPC and then clicking through their dialogue tree is a game design decision. The writers did a pretty good job writing the spoonfed exposition. The voice actors did a great job delivering the spoonfed exposition.
The issue is that we need to discover who the characters are through their reactions to events and interactions with each other, and those elements just aren't there. The design decision to make nearly all the dialogue happen through one-on-one interactions with the player is a hurdle to immersive storytelling.
