@smmenen Good read! Very cool with a tool that can measure diversity. Seeing is believing.
My only critique of your article would be that it wasn't immediately obvious that you flipped the index. You wrote
Recall that a higher value indicates a more balanced and more diverse metagame, and a lower number indicates a less balanced and less diverse metagame, with .99 being a nearly perfectly balanced and diverse metagame with a plethora of viable decks, and a value closer to 0 being a metagame dominated basically by a single deck.
But for that sentence to make sense, you would have to have read the endnote as you make no mention above of why this changed.