snarek old fruit
You admit you are not an airspace expert. Your posts indicate an insular view of the total system. With all due respect, if your understanding of how the busy centres function, maybe you would realise NAS 2b creates an increased risk to a majority of users. Many of the users have been questioning the rationale of 2b. These people know what they're talking about. They are the one's whose career's hinge on safety assurance. 2b offers no safety assurance for controllers or pilots.
Aircraft are invisible outside 50nm of the main centres which have primary radar, if transponders are faulty or not switched on. From personal experience, this happens regularly. Remote radars are SSR only, so any enroute transponder problems means invisibilty to ATC and TCAS.
It's too late now, old buddy, to start considering these basic flaws in 2b.
4711 is exactly correct. If you are an enroute controller, I hope AsA is there to back you up when it goes tits up.
Good luck, you're going to need more of it.
CG