Looks like, after seeing a number of monsters, especially the Archdevils and demons, it seems like the trait Magic Weapon is officially outta here.
Instead, the attacks have been "updated* to incorporate the trait in a more streamlined fashion by having it be represented as Force Damage instead of Bludgeon, Piercing, Slashing in the damage type portion of the monster stat blocks. Which pretty much "boosts" the attack powers of those that have that by making it harder to resist. (Sucks for you Barbarians.)