CineD openly confirmed what had been obvious since the Sony A7V launch:

Had Sony launched a beefed-up version of the FX2 instead of the allegedly “reheated” camera, we might now be looking at Canon as the one arriving late with the EOS C50 . That would have shifted parts of the market dynamics, though it’s hard to say how much impact it would have had on real-world sales.

and…

Sony has proven itself to be a strong sprinter, entering a market long dominated by Canon and Nikon and quickly capturing a substantial share. After that initial push, the company has settled into a phase of gaining some ground, then losing some. If we’re speculating, it’s worth asking what happens if Sony announces a successor to the Sony FX3 in the near future. Imagine the specs of the a7V packaged in a square, grey, cine-first body. Even if such a camera arrives later than expected, it could create real pressure for Canon, and perhaps even more so for Nikon. This game is far from over.

I think Sony knows by now they cannot afford to launch a “conservative” updated FX3II. they need some real cool camera now!