I was initially on Ivey's side, but there are some other factors in the case that weren't reported within the links from OP...
"He asked for a specific brand of playing cards, a shuffling machine, an Asian dealer and that the same card decks be used." Old / Expired Link
"The High Court heard how Ivey kept asking the dealer to change the packs until he and Sun found one with the flawed pattern, then announced that he wanted to stick with his ‘lucky’ pack. Then Ivey persuaded the dealer to rotate each of the ‘good’ baccarat cards (specifically sixes, sevens, eights and nines) as they were dealt. It was just a silly little superstition of his, he explained. It wasn’t. If a dealer had shuffled the cards by hand, it would have ruined the ruse. But a shuffling machine — which Ivey had demanded — doesn’t do that. It flips the shuffled cards 180 degrees, which meant that Ivey and Sun were able to recognise them quickly: the non-symmetrical pattern had gone to the other side. And of course he got the casino to use the same lucky pack night after night."
IF he hadn't requested a specific brand (and deck) of cards (that he clearly knew had their printing off-set), and IF he hadn't requested a specific shuffling machine (that he knew arranged shuffled cards in a specific manner). IF he hadn't insisted the casino continue to use the pre-dealt cards they would typically scrap, and IF (as others have said) he hadn't influenced the dealer by telling them how to present the cards, then yeah, I'd still be crying foul by the casino. But not any more.
Chances are if he had 'only' limited his winnings to a smaller £ value, then he may have gotten away with it. But sorry Phil, you got greedy & in doing so, you allowed the casino to put the puzzle pieces together. Could it be called cheating? Perhaps not in the terms that some professional gamblers would define it, but there's absolutely no doubt the phrase 'advantage player' (i.e. the more polite version of the 'c' word) absolutely fits.