And does either PoE or D3, or really any ARPG, do full immunities anymore? No, they don't. Because people hated them.
And seriously. You're criticizing PoE for one trick pony builds? Have you ever seen a Whirlwind Barb in D3? Or a Frog Witch Doctor? Or an ANYTHING Wizard?
I get you don't like what PoE does. I just don't think you're articulating what you dislike very well.
They dont, but other arpg games unlike PoE are moving away from one spam skill and actually implementing mechanics where you will go through different skill with different cool downs to do max dmg or replenish mana or other resources. That is not the case in POE, as the game is balanced around one skill. There is no need for sing target, as a 5 or 6 linked items will always do more dmg than single target. There is no need for multiple dmg skills as all skills are balanced around spamming with no cool downs.
The game is flowed with bad design and very simple gameplay at its core. I am criticizing PoE for literally making the game around one trick builds, balancing it around it. I criticizing it because it makes the game to much dumb and simple, and boring, in the thing that maters most, gameplay. You can have all the complexity in building your passive tree and items, when it all falls down to one spam skill and 90% of builds using some type of aura and curse with cast on dmg set up. And than some wander why people get bored with PoE and its combat.
I am not even gonna start to talk about abomination that is the focus on economy and trading in a arpg game.