If Smith, Warner, and Bancroft play the next game, the ICC must intervene. We know it's almost entirely ineffectual, so I'm sceptical.
The more I think about this, the more I feel that Boof should be sacked, Smith and Warner suspended for multiple games and stripped of their position (and same for any other senior players involved in hatching the plot), and Bancroft should receive a suspension - which I would have suggested should be shorter than the senior players who roped him in, if he hadn't then proceeded to mislead the umpire, seemingly of his own initiative, by waving around that sunglasses cloth. I don't care if what Smith said about Boof not being aware is true. The coach bears responsibility like the captain does, and this pretty clearly shows he created a climate where senior players were willing to cheat with premeditation and take advantage of a junior player to do so. Also, when he got on the walkie-talkie to convey a message to Bancroft, it sure didn't look like the reaction of a man thinking "what the fuck happened, I demand answers".
Perhaps the integrity investigation might reveal information to change the above. But the penalties need to be severe. The rest of the cricketing world has for a long time been uncomfortable with how Australia plays the game, but Australia could offer the excuse that they were staying on the right side of the line and their rivals were being too soft. They can do this no longer, and it's so obviously the result of a toxic culture.