There's currently a feature in the monkey business section that lets you craft one nest at a time. For mass breeders and generally others who only use feathers and the likes for Nesting, it would be amazing if the way crafting worked could be changed
My suggestion is changing it to where you can craft multiple Nesting materials at once, however many nests that would be available for the amount of item uses you select.
Ie: if you select 72 uses of items, you could craft 12 nests at once since a nest is 6 uses each.
I know you can technically just nest your lions in the Nesting menu itself with your feathers, but it takes so long if you have a lot of ladies [I mass breed 30+ at a time] that I often find myself just buying Nesting material instead of crafting it to save time