The role of your tank is accentuated by maximizing your jobs ability. For warriors and drks specifically this includes maximizing damage (this increases enmity and mitigation/recovery abilities). And while I agree tanking an entire fight out of tank stance can be silly, calculated stance dance when executed correctly definitely separates the good tanks from the great tanks. Hold hate > minimize damage taken > maximize damage output while maintaining the first two.

The stances are one of the few things that actually make tanking interesting and they aren't going anywhere. Perhaps the discussion would be better provided on how to use and understand them as opposed to complaining and well wishing them away when they aren't going to change.