The majority of people who are crying for nerf on throwers are those either too stubborn or too stupid to buy a shield and close the gap to murder them.
Every class has a counter to it...even dedicated throwers. As a dedicated thrower, my biggest fear is seeing a shielder running at me, and watch their huscarl shield absord 2-3 throwing lances...and then do nothing as they kill me in melee, because as a dedicated thrower you need at least 10 power throw, and want at least 120 wpf so the reticule isn't way bigger than a horse. This means at a 30/9 build, you have at most 50 wpf in any melee you have, and you either have to give up power strike to have iron flesh, or vice versa.
Also, as a result of the high end throwing weapons being super expensive to repair (500+ per stack), you can't really wear armor, or your funds will quickly be gone. So lets recap...
Low amount of weapons - negative
High cost - negative
High damage - super positive
inaccurate - negative
squishy characters (Usually) - negative
low athletics - negative
Quick weapon draw on each throwing weapon - positive
Watching everyone cry about a build that is super easy to counter- priceless
That's a whole lot of negatives for two positives that the build has. Even then, I think the only nerf it should have is that it's pretty stupid how quickly it is to pull out new throwing weapons. If you nerf damage, or the amount of weapons in a stack, then the class will be worthless, absolutely worthless. It would be like making melee weapons that can break after a certain number of blocks...