Even if Ivey had noticed the flaw and taken advantage... so what? Casinos fault for putting on the game surely.
Unless they're about to contact everyone who had played and lost when there were imperfect cards and offer them refunds then I don't see how they've got a leg to stand on.
lol he allegedly manipulated the cards to take advantage of the design flaw. In the Gambling Act cheating is described as
....cheating at gambling may, in particular, consist of actual or attempted deception or interference in connection with—
(a)the process by which gambling is conducted, or
(b)a real or virtual game, race or other event or process to which gambling relates.
thats pretty wide but could very arguably include what Ivey is accused of.
If the casino's story is to be believed he is certainly a cheat and doesn't deserve a penny.