Tanks can miss on ads while in a 10man it's impossible to hit cap the groups in many guilds. What are we supposed to do? Hit cap the tanks (just for one fight and spend 100-1000g each every time we switch boss)?
This is fundamentally bad design for a simple reason: It's not skill that is lacking but a mechanic that is right.
We reached a point where we faceroll - literally faceroll - phase 1, we can even move very smoothly on 3rd, but 2nd kills us most of the time because of misses by tanks.
What are we going to do, have only rogues and tanks? And how can a 10man guild do that?