I feel pretty silly after praising the game for the little moment where Ellie shielded her eyes from the sun. In this episode she does that calm walk down the steps, right through the crossfire… twice. It’s the most ridiculous, derpy, immersion-breaking moment in the game for me so far.
But Chris is right: AI is hard, and companion AI is harder. You could tweak Ellie’s behavior for ages and still find edge-cases where the AI just isn’t equipped to deal with the current world state in a believable way. And the smarter the AI is – the more convincing her actions are – the more ridiculous it seems when the system fails. It’s a tough problem. I’m glad it’s not my job to fix it.