That last sentence is expecially true. There was vocal concern about the blockbuster mentality goin back at least as early as 1980's In 1986, Rich Kreiner wrote a faily decent article in the Comics Journal, issue 106, which explored how this mentality was playing out in the product lines of the major publication houses at that time. So I suppose that as much as a West coast move affected DC (and Marvel), the forces that made that move happen had been in place for quite a while. I mean, Comics where just increasingly difficult to make a profit from and the profit center moved increasingly to video animation and cinema production. It is hard to pay and keep top talent without certain minimal and regular sales numbers which have been dropping steadly over the last 40 years.