Actually i'm not sure if SEEING him transform back into Evil Chuckie would have been so necessary... Sometimes that kind of stuff is best left unseen (AND it probably saves lots of time and money as well
).
But as i said, i'll have to see the scene again to really comment - I remember the basics, but not quite how it was done in details.
We still basically agree anyway : it was overall pretty good, but did miss some punch to really make a great impression.