ADHD memes

adp was added because you can just walk away from an attack easier than rolling in a lot of cases.

Probably part of the motivation is to make iframes a security similar to health, the more you invest into it the more leniency you get.

Agility also affects casting and item use speed, so it's possible they thought of that first, then felt that iframes would logically fit into that set since it also has to do with agility.