They banned very specific players from groups where everyone were using addons. They players that were banned had information not provited to the player intentionally even if it was UI, it was not QoL change. FFXIV devs were very responsive in the past about changes, but now people just download addons and never actually ask for changes. Lets not hide straight up cheating behind "QoL", otherwise we will not take any QoL updates in FF.
I played most of the content blind without external tools, cleaning it, absolutely YES, not that fast absolutely why using tools is called "cheating". I will go to the main arguments for console really fast:
Capture video (consoles can capture video, on ps4, you can start video at any time. On ps5 you don't even need to start a video, you can just click to show you last 30 minutes, I am personally using this feature during high end blind runs).
Can't find out if physical/magical - this is myth that came up from streamers with addons. I personally use Log 4 with only "actions initiated by engaged enemies". Boss casts mean magical, boss readies/uses means physical. Most of the times you can recognize that by the visual feedback of the attack or testing too, but I feel like log is pretty comfortable.
And lastely, the best ninja rotation of the Shadowbringers expansion didn't came from FFlogs optimization, but from a youtuber who used dummy and Stone, Sky, Sea calculator +controller, yes controller.
And no, youtube is not third party tool. Yet I already told you, yes we complete blind runs without any issues. I personally play on both PC and PS5, depends on my mood or where I am, if you understand the game it is equally playable on both (only annoying thing is I need external device for discord while on Ps5 because I don't gather group exclusively on PS to use their voice program).
I am working in the game industry from almost 10 years now, not only I don't know how testing works in all big companies, I can't tell you how it works even for all of the games in the company I work in. There are projects with "balance dev test team" that have nothing to do with QA, because they are working exclusively in the studio and their job is to push the limits of content. In FF we know from years Yoshi P have his dev group that are some the best players in the world, not only in Square. The argument "I worked and I know all about it" is so ilogical.