Crossbows Basic Collection has awesome new crossbows, but the leveled lists seem like an afterthought. When I played with it, I rarely ran into enemies with crossbows.
So I checked Crossbows Revamped, which is supposedly a balanced crossbow integration mod, and it includes the crossbows from the above mod as well. Unfortunately, the mod seems to be a little broken. The crossbows typically have lower stats than their bow counter-parts, when it should be the opposite, and it makes the standard steel crossbow more powerful than the Orcish and Dwemer ones.
And from searching, it seems that these are the only mods that do what I am looking for, but neither seems to put them into leveled lists in a way I like. I'd go ahead and make my own mod, but unfortunately, I'm only beginning to learn about the CK and I don't have the modding acumen to make something like that.