Procedural separation?
I don't think the intent of Class E is to be non-surveillance therefore procedural sep, do-able, no probs. There are huge advances in surveillance and much cheaper than setting up radar heads all over the place.
Hoosten - E without surveillance can work but like all procedural separation it is very slow and clunky - ALL airspace is safer with surveillance.
I hear you, my reply above yours is probably applicable to you too I reckon?