Got to love the conspiracy theories on the first page.
I wonder if people know it is perfectly possible to make higher graphics quality for higher end systems and lower end quality for lower end systems... i know sometimes producers do limit the PC version so as to not have too big a disparity between different systems, but usually when it gets console release first or early on. It would be highly foolish of FD to try and sneak something in like this now when people have screenshots and vids from earlier if this was the sole reason.
There are more likely reasons:
1) Objective vs subjective: In other words the people responsible for the changes (art team, devs, etc) prefer the look of the new rings whereas some players don't.
2) They are experimenting with different lighting effects and stuff and there may be future changes to come while they play.
3) Optmization changes to provide a better experience for even those on high end machines, as they noted problems with the old rendering, even if it means a sacrifice in quality.
4) A technical mess up, in which case people can raise a bug report rather than just moaning about it. (Heaven forfend stopping people on the forums having a good old fashioned moan though!).
And, if you really are inclined:
5) Dumbing down for consoles because <reasons>
But i insist people wear a tinfoil hat if they assume 5 is the reason