I think the cell " ENGRAVER" must be changed to "Engraver / designer" when we add coins. because today most of coins are minted at private Mints of Foreign by some countries requests. As usual, coin designers today are most important people in coin description for most countries, then engravers.
2. Better if will be added a " proof" cell in coin main characteristics .And we willnot add " Proof" in comments if coin is only proof ( for proof commemorative issues)