Ah ok- i originally though that and then saw just "Press" but thought i was outa my mind. Was running out the door then haha.
Also, if it's something as minor as neutral grip chins to wide grip chins and he can do more wide grip chins, why stray away from what is working? It's not like he can bench 220 and only deadlift 220- in that case, i would agree that he would need to work on his deadlift because it would be lacking a lot, but when it's chins, i think doing 6+ more wide grip chins is better than 6 neutral grip chins and taking the time to work your way up on those.
IDK depends on his goals then i guess