I agree. But for silver coins, it literally requires an act of congress. Even a minor change like edge-lettering: http://www.coinnews.net/2015/12/07/30th-anniversary-edge-lettering-for-2016-american-silver-eagles/
And the Liberty on Eagle coins looks nothing like Weinman,s design either. Just another expensive bullion coin.
Agreed, the details could show beautifully. But I think the design might not translate well to a larger 1 oz format. Too over-sized for my taste: https://www.providentmetals.com/mercury-dime-1-oz-999-fine-silver-bullion-round-19556.html
Just because Provident hired a hack doesn't mean a real sculptor couldn't have done a good job. Wonder if the mint still has the original plaster models?