You don't need to use plugins to know you're doing well on current DRG, you don't need plugins telling you when you successfully found a way to sneak that mirage dive before the boss phased away without losing dps elsewhere, that was one of the beauties of Eyes, direct visual pat in the back telling you did good. Ironically after the eye removal it will all come down to what the numbers say.

One of the best feelings in the game, the first highly anticipated 2min DRG burst won't exist anymore, opener and all evens will be virtually the same and will blur in the progging, I assume something like P3S would feel very mediocre in DT and might even get less potential see less animations in the fight.
If anything these changes are gonna lead down the community into unfun optimizations becoming more of the norm like swing timers have started to pop up in discords, or having dedicated members slow down dps on purpose becoming more and more common, decimal gaming and generally the job feeling like you're playing it wrong even when you're not, like a lot of jobs do on fights like TOP.
All while SE continues their batshit insane boss mechanics arms race proliferation which... you've guessed it, keeps promoting 3rd party tools as the norm more and more.