It seems several sources of physical resist have been removed, replaced with +armor, or moved to constellations/gear that you wouldn’t normally pick up on a tanky melee character. Since this makes melee characters less tanky, they also lowered enemy physical damage by [AMOUNT_NOT_FOUND] to try to offset it a bit. In general, I’m gonna trust that they know what they’re doing and that this is a positive change that will leave melee mostly untouched while making squishies less squishy.
I don’t think this will be a net “nicer to melee players,” though.