often enough things like this use the same code for both PVP and PVE so if they change one they have to change the other. the other option is to go in rewrite a bunch of code give every weapon to sets of stats and then when up dates come not get the codes mixed up and accidentally nerf your PVE when it was ment for the PVP. not to mention this kind of path would take hours to DL for a patch. then things get more and more complex as they work on the doubled system. patches take longer to develop and out put. thing get mixed up or broken. servers go down weeks at a time while they figure out what is wrong. parade of issues that just crop up. of course it could also go smoothly and every thing works wonderfully and only the occasional -blam!- up happens. rather not take that chance that something -blam!-s up though.