A similar thing is happening across the runway at FZ.
Flying to "short haul" destinations barely inside FTLs, but to be fair to the GCAA if a route goes in to discretion on a regular basis FZ are made to change the timings to a more favourable FTL band or FZ are forced to deadhead crew on a 737.
My point being the GCAA does listen (sometimes), filling a single ASR may not change anything, but a whole fleet of captins filling ASRs & Discretion reports does get noticed at the GCAA.
There is a drive to get pilots to be more honest & file ASRs about fatigue at FZ, if enough are filled by both companies things will change, slowly, inshallah, but it's better than no change at all.