It's not getting more attention because it's not worth discussing again.
Thread: Feature request DPS check for PS players
Thread: In Defence of DPS meters.
Thread: PS4 damage meters
Thread: FXIV parser/DPS meter
Thread: PS4 Players want usable parsers
Thread: DPS meter similar to Aggro meter.
Thread: DPS meter / Connection info + FPS / Friend list
Thread: Damage meters for the PS4 please.
Thread: DPS Gauge, non number generated
Thread: Why not a dps tracker in UI?
Thread: DPS reader on PS4
Thread: Because everyone Loves Parsers
That's just the results from the UI/UX forum. There are another seven pages of results from the General forum.

The dev stance is clear: Yoshi-P doesn't want to add this in game. Even if it's "optional" and "personal", the players will make it mandatory and require people to share their numbers. See this translation of a Feb 2020 broadcast:
Quote Originally Posted by Yoshi-P (translation by blluist)
Then the next suggestion comes up: make an official ACT built into the game. We've always said we will not do that. That system will be the root of bullying. I'm 100% confident in that.

I'm aware there will be people using it to calculate personal numbers, but I know you'll see this in party finders: "Only join if you can prove you can dps xxx amount." We never want that to happen. We've said this many times, but we will not make a built-in ACT system.