I mean the part is about the same, maybe not the texture of the slope, but the rest is the same, except the color, which looks trans instead of solid opaque.
You didn't mention the color issues initially. Those could possibly be a plastic issue (although it's probably more likely a dye issue). But as for the other issues you mentioned, they're related to the molding process. The texture on the slope has to do with the surface finish on the mold (issues with slopes being too smooth were so endemic half a decade or so ago that I was under the impression that the smoother slopes were a deliberate change being phased in), and I assume by "the stud looks softer" you're referring to the crispness of the mold and not literal softness.
I'm sorry if I was a little blunt, but having been a Bionicle fan I've dealt with the fallout of widespread oversimplification of part defects for a long time. In 2007 there was a bad batch of lime-green joint pieces that was extremely brittle, and it was initially blamed on "cheap plastic" (later, we got the official story—that this batch cooled too quickly and became brittle as a result—thus, the plastic formulation was the same). Then in subsequent years a new joint piece was introduced that also had a tendency to crack, and it was widely assumed to be caused by the same "cheap plastic" (even though it seems to have been a flaw in the geometries of the redesigned joint). Both issues were also widely blamed specifically on cheap plastic from China, even though to my knowledge the only Bionicle parts ever produced in China were the electronic "light-up" elements from 2006—a year before the fragile joints became a widespread problem.
Quality issues in Lego are a big problem, and one that the company has been shown to be very concerned about. But fan misinterpretations of defects, especially ones that attribute multiple types of defects to a single cause, make multiple isolated problems seem like a single endemic problem. That poisons the dialogue and leads to kneejerk reactions, including accusations, boycotts and demands issued at Lego based on flawed assumptions. Fans should definitely continue to report quality issues to Lego and share concerns with each other—after all, corroborating evidence can help to identify real large-scale quality issues when they occur. But pinning the blame on a single factor without the evidence to prove it makes it harder for other fans to tell isolated problems apart from widespread ones.
Edited by Lyichir, 17 February 2014 - 07:16 PM.