The nerf is pretty ridiculous. Let's say I want to level up Leatherworking and am obtaining the hides myself through skinning. As Leatherworking is such a slow skill, I am already above 16 skinning at only 8 Leatherworking and therefore have to keep skinning lower tier monsters to gain Tattered Hide. It's not fair that on top of this, I am obtaining next to no Skinning XP for it because the skills are so unbalanced.
The same example applies for Prospecting/Armoursmithing and probably others.
The price of lower tier items such as Copper Bars and Tattered hide are on the rise (and are likely to rise above the next tier) because of this; nobody wants to go and gather them themselves and receive poor xp for it.