I think anyone who claims adaptation is "op" doesn't really know what they're talking about.

The way the mod works is that you have build it up through consecutive hits. That means you have to survive consecutive hits to reap the benefits. Once the duration runs out you have to do it over again. Think of it like Chroma's Vex Armor. This mod will not save you at higher levels because you will not have any of the damage mitigation to survive the first few hits to build up the damage mitigation.

Frames like Wukong and Valkyr have invulnerability. Invisibility Frames are what you would call "op".

This mod is not "op". It is a good mod for certain frames but it has a major flaw or catch to it.

If DE nerfs it then it shows how out of touch they are with balancing frames.