I have a slightly tangential one, too. I don't understand why this leak (of the source code) is such a big deal. I genuinely don't understand. What exactly can people do with the (the best case) a half-baked game? To exaggerate a bit, these days we get even 'finished' games in such a 'raw' state, people barely want them for free.
As for the negativity. I suppose, one could dig some pieces of the main story lines from the source files, and try to predict how the new story is going to be told. But that would be nothing but a speculation. It is impossible to tell what Rockstar are going to do with the game until we see a finished product. And, to state the obvious again, the game is far from finished.
Drawing conclusions from that early (to say the least) build is ridiculous. Do people on reddit have some extrapolated opinions on GTA 7, too?