I think as the title already says. DR should be equally good compared to evasion. It's been so poorly designed for years that when you play dr against eva classes, you don't have much of an equal opportunity. Small example an eva class (ninja) with 340 dp but with enough AP, can beat a class (warri) that has much more dp. AP values in my example are the same. Simply because the class does not hit them... balance not existing.... This is also the reason why players only focus on AP. DR is worth nothing!

Eva doesn't even work on such low DP you're talking. Regardless eva does less damage, so that's the tradeoff there.

That's a gear issue, like you say people who only focus on AP often do not have the accuracy they need to hit evasion builds. Therefore only focusing on AP is the problem.
So would you be okay to give all evasion players more AP, in return to make DR tankier? cause that's the tradeoff you do going evasion.
I'm curious is the 340 dp in your example a typo? Because being unable to kill a 340dp Ninja has nothing to do with evasion.