I enjoyed the episode, but I agree it was probably the weakest in the whole series, or at least one of them. I also was confused by how Akecheta managed to find his way through the facility.
However, I loved that we got a closer glimpse at the Valley thanks to him, and I also loved the scene with him and Ford. This show also does a great job at making the various cultures feel authentic and lifelike. So the episode wasn't a total waste. We've had two massive, almost-finale-like episodes this season already, so I am not disappointed with the show. It's a sci-fi show with a heavy emphasis on themes about consciousness, reality, and understanding one's purpose, or finding some meaning to life (and what is 'life' anyway?). I actually expect it to be slow and convoluted, so maybe that's why I'm not as upset as my friends and other people are with the direction of season 2.
I think the finale is going to be huge. I can't wait! Only 2 more weeks... then nothing to watch for a couple months.