I think one issue might be that there aren't *actually* that many E6+ trad climbers regularly on here. And it's very peak-centric.
I guess what really need to happen in the E7+ bracket is for someone to create a graded list database, where people who have actually climbed the routes can give a suggestion of E grade, French grade, font grade for crux etc. And then rank them in their own personal order of difficulty. Crunch all the numbers and, voila!