To be honest, the 10% looks like an arbitrary number that was assigned years ago. Perhaps in the early stages, this made sense. However, we are at the point now where Hive is a lot more robust than it was when things were originally coded.
Only on paper did 10% make sense.
The theory did not match reality.
Steem ironically death-spiraled even harder because of this limitation.
Funny how I have to beat a dead horse even after you linked my own post on the subject. HBD is pretty important though. I think we are headed in the right direction. I'm very glad no one at the top is entertaining trying to scrap it and remove it from the ecosystem.