Originally Posted by JARblue

There's a lot of different rolls for each legendary. Elite builds will require a lot of grinding to find good rolls on most/all items. Rare/magic items aren't really useful once you reach max lvl except for salvaging materials. With the higher drop rate, you can find a good base build quickly and go from there.

Before the seasons started, each patch could significant affect one or more elements of game play. I would not be surprised at all if that is the reason you feel that resist all is less common. They also knocked down the monster dmg a lot while increasing base player def. So resists don't have the same impact they once have nor are they as critical.