CCF/tunnels in the sky got binned - absolutely no flexibility during weather avoiding & couldn't handle multiple inbounds to one airfield with varying speed differentials. However the current methods do have similarities & when we need, we have the ability TO USE RADAR HEADINGS to solve these kind of situations to ensure each aircraft is given the best possible service. By best possible service, I mean that with RADAR HEADINGS more aircraft can be given continuous climb & descents & also more "when ready"'s. As I have previously said, STAR's don't cater for multiple arrivals bunched together & airspace packs several STAR's together so we are very limited on solutions to guarantee safe passage.
Bomber H - to get a visit I'd start with whoever you fly for, see if they can arrange a visit on your behalf. Another way is to look out on PPRuNe late summer/early autumn & get involved with our winter TRUCE program where we always ask for cockpit crews to come advise us on our yearly emergency training. Finally, if you happen to know an ATCO, nag them to take you around - the experience will probably be far better than any of the other options as you get to see the real deal for a good length of time & soak it all in
Where are you based?