Inspired by this awesome answer which, to me, is such an excellent and succinct explanation by example of the "feudalism (as popularly understood) did not exist" position that I think it deserves to be promoted to the FAQ under the 'Feudalism' subcategory. Looking at the answers in the FAQ now for the 'Feudalism' subcategory, the most recent is 4 years ago, and none of the previous answers appear to have this particular illustrative story from 11th century France.
So does such a process exist already? (given the age of many answers in the FAQ, probably not).
Are the mods interested in creating some sort of more formal process for FAQ updates? Possibly involving user nominations and user (or maybe just moderator/flair) voting on nominations (just throwing out some ideas here).
There's a few problems behind the FAQ at present. First is that there actually isn't really a process behind the FAQ; it's essentially an ad-hoc effort by whichever flairs and mods can be arsed to edit the thing. Second is that it is by definition a collaborative effort - no one person has the expertise to judge all the answers listed on it, so a user can only really judge their own field there. And then there's the problem of time, especially when faced with the sheer size of the FAQ. So anyone wanting to put work into the FAQ has to be arsed enough to do it, and arses are in short supply in this subreddit - even our best and most-committed users still find time to be the major bar in contributing here.
Thus, any assistance from all other quarters is more than welcome! Modmail is the main channel to communicate with the mod team and bring a concern to our attention. Thus, if you see an answer you believe is FAQ-worthy, modmail us about it! We'll take things from there.
To echo the answer from Mr Kensington, you write to the mods by sending a PM with "/r/askhistorians" instead of a username and include links to the answers you want on the subreddit FAQ in the body text, perhaps including "FAQ" in the subject line. If you see certain non-flairs writing lots of really good answers week after week, you can nominate them for a "Quality Contributor" flair also through modmail.
I agree with your nomination and have added your link to the Middle Ages FAQ, crediting you in the annotation.