Interesting. In racing one of the most important things we work on is weight. Horse power is nice but weight is more important. There are two types of weight, sprung and unsprung. Lowering unsprung weight or that weight in and around the wheel is an order of magnitude more important than, for example, taking out any part of the interior not useful to the driver. This is why people will spend up to $10k for carbon fiber wheels, another 10k plus for light weight brakes, etc. That these engineers have dropped all of this weight into an unsprung area seems antithetical to me.
Rule #1, Don't lose money. Rule #2, read rule #1. - WB.