Wow! So many plot lines left in the balance! Maybe too many...
It seems as though they had so much they wanted to get into the Season, the crammed in a tonne of stuff and then realised they didn't have time to conclude anything. Perhaps this was the plan from the outset.
It is a shame the didn't add some of this tension to some previous episodes! Some of them felt like fillers to pad out the series. I think they need to have a big review of the way they decide how the next Season pans out.
One the whole, a great Season! Can't wait for the next!