Actually the statue, the 'FG' and the roof line edges are more often missing because of the an over polished die issue. Not from a weaker strike. The abraiding of the die removes more the the field area. This makes the devices smaller, and weakens the design of the devices I mentioned above. This seems to happen a lot on the 83 & 84 dies as they had a lot of clashes on those years. So it just an event that happen a lot that year.