PVE will take much more coding and time to adjust, plus they are likely waiting for the DLC in december for this. PVP most likely has hotfix ability because they already knew balancing was going to be needed prior to launch so they set it up to be easily modified and tweaked. Plus CoD is about to come out so yea I bet they're trying to keep the chunk of players that like pvp and mmo, hence being able to get 30 light gear without raiding and such.