I see your point. No, I have never worked on a proposal affecting multiple libraries (not to speak about multiple core libraries). I agree we should also improve this situation. In contrast to my suggestions above about adding some paragraphs to haskell.org, I do not know how and where to start.
For reference, because I had to look it up: AFPP.
Just so that it doesn’t get lost, please let me know if you think it is a good start to summarize important Haskell organizations on haskell.org.