You want the reader to care about your characters — if they don’t, then there’s no emotional involvement. But at the same time, I want my characters to be nuanced, to be gray, to be human beings. I think human beings are all nuanced. There’s this tendency to want to make people into heroes and villains. And I think there are villains in real life and there are heroes in real life. But even the greatest heroes have flaws and do bad things, and even the greatest heroes are capable of love and pain and occasionally have moments where you can feel sympathetic for them. As much as I love science fiction and fantasy and imaginative stuff, you always have to go back to real life as your touchstone and say, What is the truth?

Game of Thrones: George R. R. Martin Interview

In a recent interview, Jon Snow (Kit Harington) has warned fans not to get excited for any sort of closure in Season 7 (Interview in link below)

Kit further added:-

"I don’t think you should look too much for closure at this stage in the game, but you definitely do see some meetings that you’ve been waiting for for a very long time. This season moves at an incredible pace, and one that we’re used to from Thrones. A lot happens in a very short space of time, and for that reiason, it’s completely different from other season there’s been."

These lines do make sense, because Season 7 & 8 were scripted in close conjunction with each other and it makes complete sense to close Season 7 as a Cliffhanger of sorts (IMHO).