i dont know enough about the double eagles to give accurate criticism but I can give you a few tips on the morgan one.
in 1878, there were more than just 3 hubs used. i'll have to look up the exact number but there are at least 10 hub varieties. theres also about 200 die varieties just for 1878P.
the highest grade for a
Morgan dollar is maybe half a dozen MS69. 1880S, 1881S, 1896S are the three dates I know of; and PR69 1880, 1881, 1895, 1896, 1898, 1899. I dont have access to the population reports from the top
TPG companies but I'm sure someone here does.
1893S had a mintage of 100,000 I think.
RedBook says 77k, but every other report I've seen has 100,000.
i think you should mention the GSA sales and condition rarities; especially coins like 1885CC and 1903O where a G4 one is only 10%less than a mint state one, and also the 84S and 92S where a circulated piece is relatively common but mint state ones go into the tens and hundreds of thousands of dollars. morgans are the most unique type when it comes to condition rarities. hundreds of millions of morgans sat in vaults for decades and are still uncirculated, while other dates were entirely placed into circulation.