"The Shepard?" Come on. They deified her/him. Your entire team is probably part of the pantheon. PRIMATIVE SOCIETY. 10,000 yrs into the future. If it said that in the code notes, that's what it is. The tweets said there is the capability of building the relays. The stargazer scene is probably a temperate region on the jungle planet, at least that's what it looks like.
However look at the earth around London. Do you seriously think the priority is building the relays? No. The priority is growing food, clean up, fresh water, rebuilding infrastructure, rebuilding the planetary economy, locally infighting over what little resources are left, killing one another, killing remaining husks first though. No one starves but there might be a mass extinction from high cancer rates. Lots of eezo in the water supplies from the crashed reapers (not just the fallen over ones). Natural biotics start evolving. But you've got a primative society. That scene could have taken place in the 1950s which by todays technological standards was primative.
Of course if you chose Green, you won't need food, water, or an economy because you'll be a frakkin' Cylon. And the relays get rebuilt.