With what Niccolo said. Theres change thats improvement, and change for the sake of change. Both of which are subjective. With that said in my opinion what is "wrong" with current movement controls has less to do with movement control style and more with the package its in.

The motion capture we have now is good. The current movement style/controls are fine in my opinion. Could an option or change to a "standard" formula help some new players who arrive from a game with that forumla, i can see that.

In my opinion thats independant of if the current controls do or do not "work" for an MMO.

Fluid and responsive need not equal something else in this case. Nor do i see any advantage one player may have over another when both can or are using the same controls.

Which i think brings us preferance. Some like how we move now, some like another way. Do we really need to be rude over that?