While the composition issue is interesting, I think the Mint would be better off re-striking early designs annually. Start off with the earliest versions of each coins replicated with current circulation metals for circulation, and prior compositions for special sets. A year for each set of designs would ensure that they will be circulated in quantity and still have enough for folks to pull from change for keepsakes.
They would have to be the current size of course, but with the original designs. Imagine a 2015 coin series of Flowing Hair Dollars, Halves Nickels and Cents with Draped Bust dimes and Quarters followed by a 2016 series of the next design for each of those coins...
A program like this would create considerable interest much like the
Statehood Quarters program did. While other programs (
ATB and the dollar series) have been dismal flops the Heritage Coin series would likely be a rousing success. A great deal of profit would also be created.