It's all about costs. They reduced the amount of steel and replaced 9 individual plastic parts with one, which contributes to a shorter install time. Any increased air flow is just a byproduct.
I purchased a Mopar Vehicle Protection Plan two years ago and just paid the last payment. I have four more years left on the plan and I was told that if I never use it I will get my full purchase price refunded. If I do use it, there will be a $100 charge per visit. Not that I have problems...
Had my 5 year anniversary last month, 45K and no problems. Only went to the dealership for the Aux Battery and then to get the steering box TSB addressed before the warranty ran out.