If you dont feel its worth it, then why do it?
Back in the days when the weapons were relevant content I understood the complains, specially about the Atma-grind because you kinda had to do it to get the best weapon (depending on the stage it was either outright BiS or the next best thing for everyone who couldnt get their raid-weapon, either because they werent raiding or just had no luck with drops).
But now...?
As you notice yourself: Its a glamour-item - not only one though, but several.
If the grind isnt worth it to you, you can choose not to do it. Simple as that.
I dont feel like this really needs to be nerfed heavly again - it has been made so, so much easier already and given the nature of the whole questline, including the lore and the narration of the story, I dont think it would be appropriate if you could just breeze through it.
I finished two ARR-relics when they were current content and a third after the nerfs (I think I have a fourth Atma-weapon somewhere...) and I always liked having a project to work on with a reward that was indeed worth it to me.
You are entitled to your opinion that its not worth it, but personally I dont share that opinion. And I dont share the idea that just because its super easy now to get the ARR-EX-primal mounts everything else has to be handed to you on a silver plate aswell. HW and SB relics dont "replace" the ARR one either - neither are actual relevant weapons aswell (the HW outright arent, the SB ones have enough alternatives that you dont have to do that relic-grind either). This isnt "Oh, we got this new relic, lets throw everything about the old one into the trash!"
Yes, the relic - any of the relics - can be a grind and maybe with the outdated stuff its not as necessary anymore to keep us busy, but at the same time you can choose that you dont want to be kept busy with it at all, even as this very, very nerfed stage.
Personally I know that getting a fourth relic or a fifth would be worth it to me and I would actually like to go through the quest again, even at its current stage. But I only really play 3 classes and all of them got their relics, so...