I know the devs are pretty much ignoring us now but I think the main problem with throwing is that there is too much that conflicts. Half the things in place are there trying to force us to only use throwing in hybrid builds. The other half is punishing us for hybriding. It doesn't make any sense. If the devs don't want us to have powerthrow 9 or 10 then they should make it easier to hybrid. Wearing armor reduces wpf quite a bit. The recent change to damage made the midrange throwing weapons near useless against anyone with armor. The lowered stacks, while a good thing, mean we are now carrying twice the weight and getting hit with twice the repair cost for the better throwing weapons.
It's just not balanced, in the sense that there is too much conflicting when trying to plan a build. If I could make two suggestions, I'd say lower throwing weapon cost and weight a little bit to even out the slot reduction, and then take a look at weight effecting throwing wpf. The higher tier throwing weapons are just too heavy to carry 4 times, and way too expensive considering that we HAVE to use them in order to kill anyone with plate. It doesn't seem appropriate that weight should effect throwing as much as it does to archery, especially when it doesn't really effect x-bowers.