That wasn't a "finale", it was just a teaser episode leading to the next half of the season. It sucks, that's just how it is, though.
The prison murder scenes were fantastic. I really liked how smart they played it - cancer comes back, Walt remembers why he started doing everything, Walt sees the cash, all is well... and Hank sees the WW book.
I mean, Walt thinking he can just up and leave is kind of silly, given the deals he's made with this new cartel or whatever we're calling it. We're headed for quite a wild ride with 8 more episodes.