The guys behind me in the queue at Toys r us worked on the film.
They confirmed a lot of stuff and showed me a ton of pictures to back up their claim. Also videos from the sets. I saw what Maz's place looks like and a lot of background characters and props. I also know what the Knights of Ren will wear. A glossy black/dark mask but it looks like the eyes, noses and mouth eaten/burned away.
Sort of like this but really shiny and bubbled up and burnt around the holes.
They also said Hasbro was the first on set and vetoed a ton of cool designs because they would be too hard to translate into toys. They were very unhappy with this. And felt the production was hampered by it.
They think the film will be the third best Star Wars film. Better than the prequels but there are apparently some frustrating things that stop it being amazing.
They said there are no references to the prequels and they are basically ignored by the film. Carrying on as if they didn't happen.
The new trooper blasters are 3D printed and fragile as hell. Peter Mayhew was only used for sit down stuff as we all guessed. His double does most of the heavy lifting. The rest of the stuff is a blur. Very cool and exciting stuff.