AMC does weird with their shows, sometimes. It wouldn't surprise me at all if they DID split it into two seasons, even, or otherwise.
OK, on to this episode:
1) Walt is a ing idiot, and an egomaniac, to boot. When your DEA bro-in-law is about to give up on his quasi investigation, you don't give him ammo to continue, just because he thinks someone else (Gale) is responsible for your primo product.
2) I still think Gus and Mike are setting up Jesse. The life of one of Gus's couriers is a very dangerous one, and that would be the perfect way to kill him without actually "killing" him. Just put him in the back of one of the chicken batter/Meth delivery trucks, and let the cartel do the rest.
3) I think Gus is done. With Hank finding the Pollos Hermanos t-shirt at the scene of the murder of Gale the vegan, I think the jig is up.