The way armor works is too RNG in Path of Exile
Problem with all these other forms of defense is that you no longer really need armor or evasion. You can run big Energy shield, and still have all those layers around for defense. Why would you run Armor or Evasion when you can run double or triple the 'life' pool?
Another good question: Why would you run armor when you can run all those other layers, which are far more effective phys mitigation than armor could ever be? Going armor is a joke compared to Energy shield, because the way armor works is too RNG (not to mention how much investment you need to actually make it work well). Make it flat phys DR instead, and it would work a lot better.
The real problem is that when you make a build it centers on doing 1 thing really well. You can't have almost any bad map mods when builds are centered around one thing. It would make more sense to somehow allow characters to build around 2 things, maybe a primary and a secondary. Then they could work the primary unless they get a debilitating map mod, and then they use the secondary.
The problem isn't really map mods. The problem is that armor and evasion are not even close to as good as having a giant 'life' pool. Armor and evasion are too RNG. With Energy shield you always have that giant 'life' pool. It's consistent. Plus you can still get tons of defense from other sources, as mentioned. If there were less other sources armor and evasion would be more worthwhile.

Mar
poe4orbs:PoE 3.10 Delirium Ranger Popular Starter Build
Take a look at the PoE 3.10 Delirium Ranger Builds (Deadeye, Pathfinder, Raider) prepared by R4pg for you! You can choose a cheap poe starter build to get through the early content quickly, then some high-damage endgame builds also wait you view!

Nov
This means you now have legacy items
What you're thinking of is something along the lines of Legendaries from other games, which are the super GG items that have no better equivalent and are very rare.

Dec
Improve your clear speed and also make the PoE more enjoyable
Just 2 quick things that might improve your clear speed and also make the game more enjoyable

Nov
Introduction of some Path of Exile players' accounts
im a cast on crit arc ranger and can put on a sick light show for you if i win the Path of Exile orbs. just started playing again and im having a blast but i struggle in poverty

Dec
Real 10% OFF for POE Chaos and Exalted Orbs in Xmas and New Year
How time flies! Christmas is coming again. Guess you guys cannot even wait to celebrate and enjoy this wonderful festival! And we have also prepare gift for all of you!