WHM doesn't even need to have ridiculous dps compared to the other two, but what gets to me most is how WHM is the least capable of healing while doing dps. As a WHM you don't get both, you pick one or the other. SCH suffers heal tax too, but can output a fairly decent hps without suffering too much loss. AST pays no heal tax at all. WHM however kills its heal output just to barely keep up with the other two on dps. Assize is blown on cd for damage, lilies are for movement or intermissions, your oGCD's rely on very limited weave windows and GCD heals are a 300 loss.

If WHM is going to be the 0 utility healer, it should be churning out both competitive dps and healing. AST does both easily and has utility. Currently WHM functions because AST carries it and SCH isn't everyone's cup of tea, but once we divide into shield/pure and WHM is competing directly with AST for one of two "Pure" spots, it's in trouble unless things really change. Why bring a healer that does one of two things and can't do the third when you have a healer that does all 3 simultaneously.