The reason for bows/ Crossbows is that they shoot faster, and can be used in wet weather, where silent and the major thing was the storing and making of black-powder for what you need sulfer/brimstone, charcoal and salpeter components that where hard to come by and break down easily
Sulfer being mined mostly near volcanic regions and Salpeter had to collected from Poo and urine soaked ground.
Salpeter mines are mining guano, old bat poo
On the side note they where in active use in England till 1658 and the ottoman cavalry rill 1826.
Also it was a weapon favourite by rebbels during most of history at leased until it was easier to store and acces black-powder and the last longbow kill was in 1940 in Dunkirk.
Taking in account the game uses most parts of 1700 the bow is historical correct in using them.
I do agree on the firearms, there need to be more variants of them and their ammunition.
Some quirky weapons the should include are the Pepperbus, Duckfoot pistol, Volley gun, the French knife-pistol.
For archery they should include iron arrows at leased.
Would be nice to have the repeating crossbow as well