Yes, Footprint, you are correct in assuming those balcony views are from Live. They are teasers...showing bits of what lies ahead for future explorers.
Don't worry about the third lever...you've done all you can with it for now. Maybe somewhere in our 'Live' future?
Those pages you receive are adding bits and pieces to your Relto. When they are bright green (on) they add enhancements....you can turn off the improvements by simply clicking on the page in your Relto book and the improvement will disappear the next time you go to your Relto. Don't worry, though. You don't lose them entirely. You can turn them off and on as you wish.
The control panel in the upper 'shroom turns on the lights there, regulates the door where the buckets enter the room, drains the water from under the linking hut and unlocks the grate for you.
Hope these answers help.