A number of changes have been made to the power unit regulations with the aim of limiting technology in some areas in order to reduce development costs.
Changes made to bodywork design, originally aimed at reducing downforce and drag for increased efficiency, have reverted to 2012 specification.
Here we go again. One word: BS. Or is it two words? Anyway, on one hand they change the philosophy of F1 engines enough to come up with a whole wave of PR and try to create a 'green' image for F1. On the other hand engine specs are pretty much set in stone and written in the regs. Oh and lets also make cars heavier, because that's so green... Look! We're helping the industry to save fuel, we could have done much more of course, but we banned any meaningful development once again, because that would be mean
spending money on new technology, which seems to be
the only area in F1 where excessive spending is mauvais ton! Incredible architectural structures to be used just once per year for corporate hospitality? - no problem; moving masses of ground and changing whole landscapes, forming artificial islands for brand new F1 tracks? - sure; travelling around the globe (by far the biggest environmental contribution of F1, and it's negative) to visit places with empty grand stands? - of course, it's the pinnacle of motorsport! But allowing meaningful innovation and car development is way off limits. That's why even the proposed budget cap specifically didn't cover PR and hospitality.
Frankly, I don't fully understand the reasons behind this. Maybe, unlike us race fans, they just don't have any illusions about racing improving the breed so to speak, and realize that win on Sunday - sell on Monday is a thing of the past. One other reason is that restricting any innovation to exploiting loopholes in the regulations allows the powers that be to manipulate the competition, so that we have the Best Season Ever™ every year. Teams can get away with more cheating when they are trying to catch up, but the right loopholes can be closed at the right time to diminish the advantage of a team.