Icarus, you've quoted selectively. Oz next said that Flight Service provided information to pilots (to allwo them to self-segregate). His point is that E airspace is a hotch-potch of the two systems.
Given that there is no Cost-Benefit Analysis for E over D, the only conclusion that can be drawn is that this is being introduced because of ideological dogma, aided by political interference in the policy-making process of the Government.