There a couple of things in this leak that make me believe it's either genuine or based on genuine sources. It is known that a couple of CDPR devs are Troika alumni, and I found it pretty conspicuous that Bloodlines - not a marquee game by any means - is mentioned. That, and the fact that namedrop some CDPR devs that don't have much of a public profile (Miles Tost, as
B
B-universe
noted) leads me to think it's likely real or close to real. One of the early post-release leakers was later interviewed by the Washington Post, I think, so we know there are CDPR devs leaking stuff on Reddit.
That said, Adam Badowski is conspicuously absent from this narrative, which is suspicious.