So, I've seen this sort of suggestion come up a lot.
The issue is that it requires a strong editorial voice, quality control, and multiple revisions for everyone (as well as sometimes just telling people 'no') to maintain any sort of coherence, tone, or even basic compatibility or respect for canon.
This is not only a lot of work that I would have to do, but would also probably require that I piss people off in the process. I would rather not!