We were in RZ on 4th September. More people in Rz, like us were disappointed. Not really adjacent area; we were near main stage and barricade but more behind us no, area too lateral. When band was at 'e stage' or railway we didn't seen nothing,also screen not really good during some songs. Some were waiting for amenities and refreshment, waiting for backstage extraction but it was made before the 18:30 as written. Rz is good for fast check in, barricades nearness if you arrive before concert start, souvenir ticket and RED donation.
I suggest to U2 to modify this area for next dates or future tour.