Well, if the goal is to make singing mastery not suck, I think the only options available that don't result in a net increase in power for bards are to either nerf instrument mastery to a degree in order to increase the power of singing mastery, or to change the effects of the AA entirely so that it does something completely different.
That said, Wiz's suggestion makes a lot of sense. It would make singing mastery pretty much required for grouping/raiding, just like Instrument Mastery is right now. It would break things out a bit more so that Instrument was more for soloing and Singing was more for groups and raids. And in the end, they're both useful.
That said, Wiz's suggestion makes a lot of sense. It would make singing mastery pretty much required for grouping/raiding, just like Instrument Mastery is right now. It would break things out a bit more so that Instrument was more for soloing and Singing was more for groups and raids. And in the end, they're both useful.