"existing novel results, provided EY and others have some"

Indeed there are. TDT, for example, has not yet received an academic writeup. There are lots of ideas scattered through LW which could be published in journals. And the great thing about academic writing is that you are allowed to use other people's ideas, as long as you cite them. You are considered to be doing them a favor when you do that.

In general, this means that one sprinkles another person's ideas within one's own analysis; if a direct rewrite of, e.g., the TDT paper, for a journal is intended, then the original non-academic author should get credit as co-author.

I understand the point that it might not be worth the time of EY or other SI Fellows to publish ideas in journals. But if some lesser lights want to contribute, they can so so in this way.