I agree that this article focuses primarily on the "how" he cheated and the circumstantial pieces, but I've followed the story... It's a lot more than just that. I'm struggling to find the source right now (know it was via Haralabos Voulgaris's Twitter account [0]), but his win rate is something like 31 standard deviations above the mean. He also never plays high stakes anywhere else, and only plays high-stakes when his alleged co-conspirator is working. There's a ton of data-backed evidence that he's cheating. Seriously, scroll back through Haralabob's timeline and you'll find it all.
[0] https://twitter.com/haralabob/with_replies