I'm hoping that the "adjustments to the strength of open world enemies" isn't referring to nerfing hunt marks. The only two I feel could use some adjustments one way or another are Oni Yumemi due to how absurdly murderous its Ice/Shock Spikes are to melee and melee only and Aqrabuamelu's Deadly Thrust hitting like a wet noodle.

I do think the damage output of some standard enemies could use a nerf, though, especially certain humanoid NPCs. I'm nearly getting killed in just 1v1 situations against some of the Au Ra NPCs at the steppe without my chocobo helping me.