You throw DIKU around as some generic term for industry evil. It is a lot of little things, and you cannot generalize on that level and have a decent conversation. Either STFU or pick it apart in smaller chunks.
To respond to your "potting" concern, I don"t think it would be as simple as you claim. Restoration does not equal Prevention. Collision/Kiting does not equal Tanking. They"re individual and different. Combining all five of my listed concepts would give you a lot more choices. Restoration is always going to play a part, especially since you don"t start fights at low health, but it doesn"t have to play THE part.
Sucking down health pots to replace healing is retarded, I agree, but putting forth that idea is just as retarded.