Sorry about the length of time it took for this reply to be posted, but I couldn't give this much thought with evil Biology tests looming like a black shadow.
At the time of the writing of the structure, we had two or three main issues that we were trying to tackle. The one most relevant here is how "unfriendly" the GoW is to artists, storytellers, musicians, etc. The old five councilor system was highly biased toward the more technical side of things (blender, python, and other coding). We decided that the best way to change this image was to make the guild leadership more balanced, thus came the idea of Art - Tech - PR. (Random background: the original "new structure" proposal threw out councilor titles and just had five generic councilors who could fill any role at any time. This was quickly discarded as being detrimental to the efforts to make the guild more art friendly.) Quite honestly, the effort has not succeeded (take a look at the artists forum to see what I mean). I blame this mostly on myself--I was supposed to add more features to the site, which never happened. Despite that, I don't want to completely throw out the only (official) thing we have related to art and sound. I think that would overbalance the council too much. In this case, it would be toward internal bureaucracy rather than tech stuff as before. If the Inter-Guild councilor requires assistance with his job, there are always Guild Directors to "pick up the slack."
Hope this made sense... My brain is kind of mushy right now.