I'm actually feeling the opposite. Like, I'm an action game player. All type of action game, be it DMC, MGR, Bayo, or souls-like.
And I pretty much hate positionnals. Because that doesn't bring anything "action-y" to the gameplay, this is just clunky, forcing me to do small side step from times to times if I want to parse correctly.
Maybe some others answers are right. Positionnals in itself could be something valuable, but their implementation just suck tbh. No skill required, little to no thinking ahead, and mild annoyance when boss decide to turn without tank input for whatever reason.
I really don't think it would water down the gameplay to remove them. Maybe on Monk, to be fair I hate Monk (for other reasons) so I'm not the best to talk about it. But on the others jobs it's clearly not needed. SAM, DRG and RPR would be better without it. Nothing of value would be lost.