From the Game watch interview:

■タンクについて
Regarding Tanks

・ヒーラーはピュアとバリアで分けたが、タンクをMTとSTに分ける予定はない
Though the specifications between Healers will undergo changes to have Pure or Barrier based healers, there will be no plans to split the categorisation for MT or OT.

Looks like it wont be the case for now, im fearing tank Gameplay Will remain the same brainless thing for Endwalker.