I know this is flogging a dead horse but I want to shout it too.
I was experimenting with a Mammoth trap last night, basically a three sided box that I could put some archers on to shoot arrows at mammoths while I fought it without worrying about the archers getting charged by wolves or trampled by the mammoth.
Let me tell you of the two archers I had with me only one ever used their bow and that was only after I would get trampled climb up the wall put it back on jump back down and fight for about 15 seconds then repeat.
Look I like the idea of giving thralls an inventory that they can equip but I rather they just use the one weapon I give them and keep using it.