The goal of this thread is quiet simple, you can suggest features that HAVE TO BE ADDED, not features you would like to see but features that if not added you would not accept a 1.0 release.
For me, it are the following features:
A drinking system:
Really, since it was added I think brewing alcohol was the most random and empty feature added to this game and I don't bother with it. A system where colonists need to drink and drinking water from ponds without some decent filtering is dangerous. Instead, in the early game they can brew gathered plants and water into booze which is a lot safer to drink but has 'side effects'. Later on with new technology filtering could be used. (Has been like that in the middle ages)
Relations:
I'm not asking for romances and baby's, just friends and foe. I don't want to go too deep into this to leave some creativity for Tynan.

Now go ahead yourself, stuff that's required, not desired although the line is often vague.