definitly not a great ski for the moguls, if he's skiing that much moguls he should just pick up a mogul ski. If he was skiing moguls maybe 15-25% of the time then that's different, but 50% is quite a bit of time
Width really doesn't matter here as much as stiffness. And from what I hear chronic wides are pretty stiff. So...probably gonna be somewhat of a bitch in moguls.