Everytime I use WM I kill stuff extremely slow and I cant move around. I actually spent an hour on a training dummy comparing the two and I felt I hit far more bloodletters thereby increasing my dmg and also the added auto attacks plus crits on my skills appears to be far more dmg output that with WM on.
Mind you I'm only level 55 on Bard at the moment, but it doesnt sound like it changes much at 60. I actually stopped playing bard at 53 because I was so ticked by the changes so I leveled DRG instead. Now that my DRG is 60, I went back to retry bard again. I'm really not happy with WM, truthfully, they didn't need to make us casters. They could have made WM something like Blood of the Dragon for example, and that you needed to do certain actions to extend its effects over time and thereby let you use Empyreal arrow, etc.
Just a thought but Bard does need a major overhaul now in my opinion. I for one, will not be using WM, and if folks aren't happy with me for that, then I guess they can kick me =/