Well on the positive side Bateman has played seven years at Wigan and has provided the club around half a million pounds of transfer fees. KPP will get a run in his best position and having someone at the club who doesn't want to be there helps no-one. Do we also now save a marquee spot/salary? That combined with the transfer fee would take a significant chunk out of the debt forecast for next year.
On the negative side Bateman is clearly not someone who honours his commitments - has he fulfilled a contract with any club in his career? It leaves the club with a squad that isn't as strong as it could have been for the season start and the quota issues make it difficult to recruit.
I think this provides further evidence that bringing back players from the NRL has flaws - just imagine if you were asked to return to one of your previous jobs in your career. Personally I would feel flat and demotivated.