This is simply about the trend in Steem Power (Vests) distribution over time. I think it's important to remember that. Of course, that implies a lot of different things, but it's an absolute data set by itself.
I do look at the movements, and add some observations accordingly. The number of accounts in each tier and movements there of are also available on the Steemd.com Distribution page.
Yeah, I know. And you do discuss the issue in your article; I don't mean to criticize what you're doing. I just find it a little bit un-intuitive when I try to interpret the graphs. :)