LunchyPete from the DC Cosmology sub on reddit handled the editting, so that we could blur out the names and faces of basically everyone that wasn't Scott Snyder, and mute out the moments where I said my name or I was addressed by name.
As part of a charity event, Scott Snyder did a Q&A with fans to support the Hero Initiative which is dedicated to supporting struggling comic book shops. As I'm sure you can imagine, they are one industry that is extremely affected by this pandemic and many will never open their doors again. Donate if you have the means to: https://www.heroinitiative.org/
It's about 12 minutes long, but I can summarize the contents.
When asked about this specific scene:
Scott said he did not write that scene (which I knew, I just figured he might have an idea where they were going with it) but he did call James Tynion on the phone who explained that the "many aspects" are indeed the Monitor race, which he said appeared in DCU: Brave New World and was then delved into further in Final Crisis, which tells us that at least in the opinion of DC's authors the Monitor race is just one single race.
James also explained that, in his interpretation, Nil was not destroyed and then recreated. I asked him specifically about the phrase "Nil was formed with the current universal structure" from the same scene in relation to that theory and he said it's the same Nil we know from Final Crisis, just devoid of life.
Then Scott explained that he sees the 6th Dimension as being above the Multiversity Map with the "source wall" being the barrier between the rest of the Multiversity Map and the 6th Dimension, which coincides with this scene:
And of course, we know where the Source Wall is in the map relative to Nil (which is doubly confirmed by the fact that Mar Novu's aspects occupied Nil)
As far as DC scaling is concern, this tells us a couple of things definitively.
The Sixth Dimension is the new top tier of DC (that we have seen)
Monitor Brothers > Monitor Race