just like you can change skins or glow, this npc can change procs. so that you give the weapon and choose a proc. there i can think of life drain, str/con, dex/quick, dot, heal, whatever.
this way ppl who are maybe effected by str/con debuff nerf dont have to redo their temps or others have the chance to get certain proc which normally would only be accessable via skilling a certain weapon line.
the point here is that there was only a little time in live daoc where the realms had very specific procs available and is highly doubt ppl really made use of the insane combinations like 30%asr+56 dex/quick since raid weapons have not been there in big amounts and you had to be really lucky to get one. also since toa all relevant procs had been there for all realms.