I just tested the Fakebook theme. Do we have something known like widgets from WP.
It could be
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In that case you could “pimp” your theme. Its very early zero’s style - but do we have something like that…? I couldn’t find it. But thats not the same as we dont have it 
I’ve suggested it would be nice to have A native sidebar system with plugin outlets, but for now we have things like Layouts Plugin but you need quite a bit of dev knowledge to build widgets for that.
You can also look through other theme-component
You may be interested in Discourse Yearly Review
Ohh I see… discourse need a bit more user friendliness for a user like me 
theme-component are straightforward to install. Have a browse of those