I think Max von Sydow's character is an old rebel alliance general. Or an ancient nazi hiding out on another planet, of course 
I'm not sure he's dead either, didn't see him killed, did we?
Isn't Luke just surviving on midichlorians or something...
I thought BenRen was excellent, actually. He has exactly the right level of stropiness, and internal conflict you'd expect. The self-doubt and desire to prove himself that his father and grandfather had. The lust for power, countered by the urge to do the right thing, but obstructed by the desire to please and follow his master. The tendency to show off was very Anakin. I thought it was very well done. It was very believable his obsession with his GF, I thought, and thus the whole black outfit and mask. I had missed the bit about him killing the younglings, but again that's mirroring Anakin.
Hux was superb. He was cruel, menacing, driven, very well acted too. I really got the sense that he hated BenRen, that he would have been in BenRen's place if he had been blessed with the Force rather than BenRen. He was rather effective at getting things done, and didn't smash up stuff when it went wrong, either 
iisme- isn't that just what happens after conflict? 30 years later, is anyone involved any better off, or in a better position? look at WW2 after WW1 for example. I think it's trying to get across the idea that even though the rebels defeated the Empire, the universe is so huge that it had very little impact on ordinary people, who are still slaves in all but name. Local warlords still control everything, either through strength or military might, or by controlling the resources of fuel, food, and water. The fact that the main three characters were off doing what they'd always done just made it more believable I think. It brought home the belief that we are all flawed, and just insignificant specks of dust in a giant cosmos.