What people suggesting that this is over is not, the real fork is the SegWit2x in November, BCG just take advantage of the recent BCash fork, no commitment for BCG but there are for Segwit2x, especially from Jihan who is very influential in the space
You are right! That is the contentious fork we have been waiting for and I really kind of hope it would play out as expected where B2X will end up just being another BCC at the end.
It is obvious that BTG is going to be dumped and even bittrex raised a concern that even the devs are pretty much going to dump theirs. BTC will remain stable for a while while the altcoins get pumped a little and then gets dumped again for bitcoin before the next fork.