I'm not trying to be harsh on Asus or anything, but in the Amazon review I linked above, there are many people who were very dissatisfied with how Asus dealt with the defects.
So while it's great that you got lucky in this regard, I wouldn't recommend people this particular model because of the high defect rate alone (even if they choose to use Windows).
> I'm not sure I'd prefer companies releasing their own distros for this kind of stuff
It's not just keyboard shortcuts though. For example, take a look at all the modifications made for C720 from plain Ubuntu:
https://www.distroshare.com/distros/get/12/
I just don't think it's a good idea that lots of smart people get frustrated and waste time going through hardware-specific documentation and applying fixes like these.
Writing good documentation (like the Arch one you mentioned) is a better-than-nothing solution, but in my opinion releasing distros with all the right configurations for that specific hardware is the right solution.