It would be a large DPS loss if BRDs who didn't use WM at all were outdamaging BRDs who were stance dancing. The only issue I've experienced under WM is the OCD that you develop levelling BRD to 50 in 2.0, because when that Bloodletter resets while casting, your anxiety level rises through the roof. I also don't think BRD is "forced" into a certain playstyle any more than the other jobs. I don't see WARs complaining that Fell Cleave isn't usable under Defiance (healers do that enough for both roles). It's a stance. You go in, you go out.

If it's a personal issue with change and it just doesn't suit your playstyle any more, that's fair. Despite loving Rogue classes and liking NIN, I don't think it feels "Assassin" enough, due to the non-combat stealth and only 1 skill working off of stealth and no real "backstab/burst" skills. But I won't rail against SE to change NIN to suit my personal taste. That's just me though.