Honestly and I say this without any disrespect to you now I know where you’re coming from: I just don’t have the time.
All your points originate from the idea that Pandaren culture is monolithic(which to a degree it is) while also dismissing the organic interactions that happen between characters, guilds, communities and so forth on this server that have cultivated this one particular event, over the course of now three expansions, to be what it is. And there’s a part of me that can see you have some validity to your points, at least in that there is a possibility that someone could see the exclusion of other races as a negative. I myself am fine with that.
Google “Pandaren Summit”. Excluding the threads that are now gone because of deletion from the old forums, you’ll see that even when non-pandaren attend, the only rules that are strictly enforced is limiting the spam of chat/emotes during speaker events and respecting(at least OOCLY 
) the people present. If non-pandaren show up 99% of the time nothing happens to them in reality. And the extreme few who did show up didn’t disrupt the gathering and so were tolerated.
Except when that Mogu RPer popped in but that’s a whole different story. 
“Pandaren Summits” prior in their design have benefited guilds, collaborators, and the community in the format that it has been. And the fact that it continues to be remembered fondly among the playerbase as it continues to be brought up says something about not just the premise but the dedication of those involved to make them so successful.
Litterally the only thing I’ve asked since starting the event is “be pandaren”. Just for that -one- event.
Imperial Tournament? Pandaria based event. Bring anyone you’d like. Take all ze gold.
Assembly of the White Tiger? Pandaria Event. Bring everyone under the sun.
There’s so many tea festivals, roll events, hosted in Pandaria for anyone of any character to bring whomever you’d like. If I have a black and white party? Are yall going to show up in red outfits?
As I’ve said, again, since I am only one vote in this. Ya’ll can do whatever you want. But I think it’s disrespectful to keep pushing that I upend the entire formula/culture of an event for the sake of meeting every accommodation of one or two people.