I like the idea of the sling as well, though I have no idea of its effectiveness. Warhammers are already in, as is an orc variant of the two-handed flail. A two-handed hammer is planned.
It’s only young orcs that use raided human weapons sometimes. The reason why is explained in the blog post that introduced the orc faction. We’ll probably add some more orc weapons and equipment in general in time.
Shepard, Stonemason, Student and Apprentice backgrounds are all in, but the last two are combined into a single background. We’d like to add more background-specific starting gear (e.g. a cleaver for butchers), but just didn’t have the time yet to work on that.