If there was some guarantee that the COA# matched the production sequence, it would be interesting.
With larger mintages there would be multiple production dies, so there would be a set of important "first" strikes from the dies.
With a production order guarantee there could be analysis of the grades for the early strikes, and a determination if they actually generate superior strikes (e.g. does a PF-68 or PF-69 require the first 5-10 strikes of a new die?) or are silver/gold so soft as to not matter at all to a modern die?
I'm sure there are test strikes, so would any die be virgin when production strikes are commenced?