Simple - he needs a run in his favoured position to see if he can make the position his own. I do not get a lot of the criticism because he has never had a settled run in the team at centre - a few games here and there through a season hardly is a fair trial (and given he picked up a significant injury last season) so far he has been centre, wing and second row.
A player moving up from a lower league will need time to adjust (just like a young player starting in the first team) and that is not made easy when the player is in and out of the team.
Attacking play always needs more time to develop and given the Wigan's right edge is the poor relation to the left side it is not that easy to stand out as an attacking force.
Will he make it - time will tell, but I do not think he has done badly but we need to see if there is more to come with a run in the team, and lets face it if he can be a decent goal kicker it would be a major boost given how long it is since we had one of those!