Answers? The response will be "we couldn't fit everything we wanted in the game because of time/hardware limitations". And that's probably really what went on. So many games change from their initial reveal. It happens. Games change. People are acting like this is some huge conspiracy.
Then they need to explain why they used the good lighting engine in very recent marketing and why it's STILL being used to market the game when it's clearly not present in all versions of the game.