s&t, Rwy 16 is a backup runway for EIDW used a very few times a year when we get strong south-easterly winds or when main runway is out of service for whatever reason. Main runway is 10/28 which employs a state-of-the-art arrival/point merge system
https://www.eurocontrol.int/sites/de...-in-dublin.pdf
use of Rwy 16 is bad news, everyone involved knows it, there are no high speed exits, planes have to taxy all the way to the end of runway to exit, heavier b737/a320 have to backtrack a tiny bit for line-up, it's a massive pain.. so if arriving traffic hears you have 15 ahead of you, you are realistically looking at 15x3 mins or more + departures that will take forever to line up.. anyway, not a normal day at EIDW by any means.. there's not much ATC/crews can do to improve - runway itself needs upgrades, but I don't think it's going to happen - main focus is to build a parallel runway for 10/28 at the moment.. like I said, usage during peak hours of rwy 16 is so rare, it's not on top of anyone's priority list