Ferris,
'E' link airspace was tried before, and look at the results (LT, Tobago)!
As I have said elsewhere, these two RAs did not invalidate the system, although many of you devoutly believe they did.
As also said elsewhere, I am amazed at the attitude that the number ( considerably more than 2) of RAs in C, in the same calender period as NAS 2b operated, are not regarded as significant, but 2 RAs in E prove a failed system. As somebody famous said:" Please explain".
Re. you comments on US operations, suggest you read the rules, and also have a look at a lot of FAA tower hours.
Backpressure,
The only opinion I have on the subject is that ICAO based risk management allocation of finite CNS/ATM resources is the proper way to design airspace classifications.
Tootle pip!!