Hypothesis: Bard's now do LESS damage in HIGH mobility required fights.
In a situation where having WM on would do less damage than having it off, this does not necessarily mean you are doing more damage just better damage than with it on. It's still a DPS loss from an average fight. If that makes any sense.
You would have to have an extreme amount of downtime on melee DPS for this to balance properly as other classes have had their DPS increased due to the nature of their rotations we have nothing outside WM aside from SW ... which got nerfed to hell.
Essentially while WM is off you are a 2.55 Bard while other classes will always remain a 3.00 DPS.