I think you have a lot of ideas but I'm not sure they can be good for the game...
For the space elevator, it can be a good idea to create other kind of research, but the part where you shutdown the power grid is not a good idea at all ! people want to find other ressources nodes, hard drive and slug, so they will go out (and play) by them selfs. Cut the production for one day means that they won't experience what the core game has to offer.
Miner's limitation can be a good idea, but only for a more hardcore game mode. But on the other side, it mean that the game will have technicaly an end. Because when there will be no more ressources, the player's factory will be useless... and so the core game.
For the polution part, well, it will never appen, devs are clear about that.
For the mod part, il is assumed that Satisfactory already support mod. So idea about mod maybe not put in here (it's a site for idea for the main game, not for mods by fans...). But for sure a copy-past feature can be a good idea. But someone created a post about that, you should look for it and give it a up-vote.
For the recycle part, it can be a good idea to undone some craft with a loss. But burn metal or mineral composed object to gain energy seem to be pretty strange. I don't want the game to be realistic as hell but it doesnt look realistic at all.