However, I've seen controversy on lemmy.world's bot with this
TBH, I think you'd get the same controversy no matter what bias / fact checker you integrate. I've had MBFC embedded for close to a year now, and while I won't say it's perfect, the consistent "controversy" common to it and lemmy.world's bot is blown widely out of proportion and basically boils down to people getting upset about:
Having already blazed this trail, my advice is, if you have more than one source and it's practical, add both for extra coverage and make it optional so the people who would shriek about it can just turn it off.