All Considered ideas
In line with what ME wants to implement here http://www.medievalengineers.com/medieval-message-001/ (code could be shared to some extent)
Add more hostile NPCs and more complex behaviour. For inst...
Ability to place multiple blocks in the same grid space, like in Medieval Engineers.
With more focus been directed toward survival on planets, and playing without jetpacks, it is becoming more difficult to navigate tall structures without building dozens of ramps or stairs.