I'm in justusranvier's camp on this one. Not raising blocksize, *at least* roughly allowing for Moore's Law, seems insane, and would just drive some alt to gain significant marketshare.
Bandwidth doesn't increase according to Moore's.
At best, Neilson's
http://www.nngroup.com/articles/law-of-bandwidth/Your source says "10% less than Moore's law." That's not really much difference. Still a lot and still exponential, for now.