Hasbro have an obligation to their shareholders to maximize profits as much as possible, thus they have to deliver the highest quality product they can whilst cutting every corner possible.

As for the diecast content, when you look at something like Binaltech vs Alternators one of the biggest problems with the Binaltechs is that the increasingly complicated transformation sequences resulted in paint chipping, as well as joints becoming loose due to the increased weight. They were also more expensive due to the diecast and enamel paint applications.

And please don't start threads with obscure titles.