What's with the hate about pCARS 2? You do realize that almost every studio does this, right? Only because Slightly Mad are not that secretive they deserve to be scolded? I really think that most problems people have with pCARS stem from the fact that they simply know too many internals. That's why the big players have a huge wall of NDA and marketing people filtering every bit of information that gets out.
I think it's because all along the promise was to stick with the one game for years and develop it ongoing (comparisons to Destiny etc.). History tells us that as soon as work starts on a sequel all those features that 'couldn't make release but will be addressed in a patch post release' get shunted to the sequel and all the original gets is some DLC.
Also, sales wise, it minimises the potential for a long tail which has an impact on ROI for backers.