The govt doesn't need to deport him on character grounds. The whole question about the validity of his exemption is still technically up for grabs. There was no concession about that by the govt and that stupid remark by the judge about 'what more could he have done' was irrelevant and if it was a comment about the law it was in my opinion wrong because AFAIK there is no rule that a migrant is allowed into Australia on the grounds of 'I did all I could, what more could I have done?'
But it's no longer a legal issue, the political aspects have taken over and it is being misreported widely and misunderstood generally that Novax somehow 'won'. So now there are three camps, the rabid and vocal Novax supporters, a large section of the public who have been wrongly told by the media that Novax 'won' and therefore think that the govt should just let him get on with his life, and the third group is people who don't like that Novax, abetted by Tennis Australia, twisted the rules and got what he wanted. But the last group is now looking a bit churlish in the light of Novax seeming to have got a judge to make a decision in his favour. Which he did but only in a very narrow sense that he got a ruling he should be released, based on a govt concession about bumbling airport officials, and not because there is any govt concession or judicial finding that he had a valid exemption from being vaccinated.