This is phenomenal, and I feel like it signals a desperately-wanted openness from the people who make the game. I feel like this was an excellent first iteration of what I hope becomes a regular series -- "Inside ArenaNet".
This reminds me strongly of the blog posts from the creators of one of my other favorite games, Factorio. The developers have a long-running blog called Factorio Friday Facts (FFF) with hundreds of posts. They speak openly about the bugs and issues they've worked on in the game, and communicate clearly what they did to address it. And the FFF posts are *BELOVED* by the Factorio community. I would really, really love to see some sort of regular "Inside ArenaNet" post showing up, and I know others would be equally excited to have such an opportunity to learn more about what makes the game tick.
Thank you so much for posting this!