For the sake of Blizzard/the devs reading feedback, it might be worth splitting up some of these things better based on if they’re a high-level high-effort content idea or something they could theoretically ship as soon as next patch. While a lot of the stuff I’m reading in this doc is amazing from a story/world building standpoint (and as such are pretty exciting to read) many are pretty huge asks.
I’d suggest categorizing things along the likes of this, similar to what I did in my post here:
High level suggestions (something done years before release):
- Story ideas (villains for the next expansion, etc)
- Zone ideas (new or updated zones for the next expansion or the one after)
Medium level suggestions (worked on many months/a year before release):
- New systems (player profiles, housing)
- Major updates to existing systems (e.g. new dungeon difficulties, exploration mode)
Low level suggestions (worked on between a few months and weeks before release):
- New emotes (e.g. some of the ones that NPCs have)
- New character customization (minor things that fit in existing categories, including quest-based unlocks which they already have the tech for)
Naturally, this is just a suggestion, feel free to completely ignore this as well. 
I have several zone/story ideas of my own (mostly in the form of parallel content, not neccesarily being part of an expansion story) that I might end up writing out as well. Been a few years since I flexed those creative muscles.