It's being adjusted just like how they stealth nerfed the bonus roll for health loss/wounds for 917. At least they're giving you a heads up about it. But there are a handful of nerfs coming through for bards, according to this preview.
Even though 917 has been out for years, the reply was that the "bonus" was not calculating right and every time it didn't it would scream at GMs about it being wrong. So they finally fixed it....
I refuse to believe that it was a known issue for years since SMR was pushed out and it was just left there.
Anyway, it seems it's just easier to not give a true answer and nerf stuff because they want to.