I agree. I main monk in savage, and I refuse to play that job in Midgardsormr because of how frustrating it is. We've got a boss in that tier with an absolutely massive hit ring that has multiple instances of "you must stand here for 4+ GCDs" where the damage tanks (not to mention how often you drop Greased Lightning due to jump phases). I realized that because of just how terrible the fight is for that job, we do more damage as a raid if I'm playing a more poorly geared Red Mage than if I'm playing as a monk, and to be honest, most of this entire raid tier has favored ranged and casting classes over melee.
I still don't think the positional ring needs to be removed entirely, Doom Train was an absolute snore to fight as a melee because you could just stand in one place, but more bosses that have lots of requirements for standing in certain spots to do the mechanics need to have the omni-positional ring.