With the suggested Ressource change i only see 1 problem coming up ... The OP Fighter of the world form a group and gather lvl 48 materials all day long (or other mats which they want) and kill everyone that comes near - so they have everything all the time ... while lower player or unskilled PVP player have no chance of collecting anything, because they get just stomped
yeah... so keep a greater ammount of lvl 48 mats in the pvp area, but still have level 48 mats in smaller quantities around the world.
Also I would love it if you dropped your items on death. But I guess that's a whole other topic