For the Clinton server, I never stated that work email being wiped was intentional. The fact is though that almost half of her emails were securely wiped with bleachbit, and the FBI recovered 5600 work related emails, of which at most half are duplicates of those turned over. I give the benefit of the doubt and list that half of them are new. See the WSJ source for the FBI stating that they found emails that Clinton wiped.
Homicides by race - you're right about the tooltip not being as clear as can be. I need to be terse so that the tooltip can fit on mobile, but I do mean the percentage to be detailing the size of the histogram slice.
I defend using the percentages instead of whole populations though. Looking at the total population is asking what kills people the most. Looking at a breakdown of homicides is asking who kills the most. It's a case of Simpson's paradox where the subpopulation does not conform to the aggregated whole.
I'm happy you expect good work out of the site - that's what I strive to accomplish.