In TA it also had gigaflare and esunaga, which are undeniably black and white magic

I don't really see the harm - Amdapor's white mages in lore were supposed to be able to go toe to toe with Mhach's black mages but that doesn't come across in gameplay. Selene and Eos are still introduced as if they have two separate roles, As we've seen with the summoner rework, as long as the animations are sufficiently blinding people won't care (Also a job where they've suddenly picked up the respect identity torch). I think it is worth pointing out that the red mages, black mages, dark knights and even pre-rework summoner were far more true to the core of the job than sage is.

I think I remember reading that when Yoko Taro did the nier raids he wanted character deletion to be a possible consequence. It does seem a bit of an ask to have the main devs consider it seriously though.