I don't understand the hate for rehashing 4. 4 was good. After three servings of GL's poop on a stick, a rehash of 4 sets things up nicely. I suspect the "nostalgia" aspect will be heavy handed in VII as a way to draw people back in. I suspect it will disappear thereafter as the universe takes off on its own, cinematically and with all the accompanying literature in different formats. This movie just brings us back to speed.
This is a nice summary of the argument I have been making for months in this thread as soon as it became obvious they were going to play up the "nostalgia" aspect of this film. If Episode 8 is just a rehash of ESB then we are starting to see a problem. Thing is I highly doubt that will be the case. They want to tread new ground and tell creative stories in this universe. TFA was always meant to be the bridge and therefore needed to feel familiar and safe.