Utilizing muti core processors requires a multi-thread program. This isn't one of those programs and it's only 32 bit so won't utilize all the RAM mentioned by you all.
BW and all other MMO designers are wanting to include as many computers as possible. Doing that means a lot of compromise in the specs of the game itself. You will not see cutting edge graphics, DX10 or DX11 utilization, Shader 4.0, 64 bit compiling or multi processor support.
I like many of you have a pretty top notch gaming rig and most of the games out there simply do not take advantage of that power. It's a bummer but also a economic reality.