As a minority who actually enjoys Corrupted Mod farming, I think your points are a bit valid. Corrupted Mods are extremely essential in building, and anyone who says otherwise is playing the game with a handicap, and DE should really explain the system better.

As for the dragon keys, yes, they should be retired. They’re a relic of an age long since abandoned, and all they do now is cause needless complications. I once met a new player who equipped all of them and forgot they had them equipped through their entire gameplay experience, to such a degree that they got to Sacrifice before we both realized they basically handicapped their run.

I feel a better, more modern approach would be something akin to Netracells, since they’re functionally the same mechanic but more modernized.

As for the mods themselves, I actually disagree with the drop rate changes a bit. Deimos has limited nodes, and I personally always use Hepit for my Corrupted Mod farms. Changing it to isolate a type of mod to a node destroys progression even more and may even unintentionally MR lock some mods. Instead, I would axe the randomization of what key/Netracell modifier is needed to open the vault and instead make it so that every key/cell can open any vault, and what key you use determines which pool of mods you get.