The sling is still too powerful when it comes to "resource economy". Free ammo, and gives free food when hunting since it doesnt use any ammo.
I am not sure I have a problem with this. In the ancient world, slings were far more prevalent than bows, because they were cheap to make and had free ammo. (They did used to make ammo for slings, Romans called then Glades
(? I think), but of course when you ran out you could just pick up a stone.) They also had better range and stopping power than (short) bows.* The disadvantage of slings is that you can’t use them (well) in close formation. So army vs army, bows are better, and that’s why, by the Middle Ages, slings are only really used for hunting.
But until the mass combat rules for Forbidden Lands comes out
, your party will be skirmishing at most, so the wise player will choose a sling over a short bow, unless they have also got the sharpshooter talent.
*This particular “fact” gleaned through decades-old fireside conversations among re-enactors, not scientifically proven, though I am sure somebody has made a YouTube video on the subject by now, if you want to google it.