I would think that aerodynamics is the one area where a small budget team can defeat the 'big boys'. Granted, big budget teams can endlessly test a dozen designs to come up with the best solution, but a small budget team can come up with a single better solution and beat the pants off the big boys.
Open up the aero rules: let the cars go crazy.
Sorry to disappoint you Jeri but it's exactly the opposite with Aero, the more money you can throw at it -in the right way of course - the better your car will be. The minnows just can't compete with either the design office staff and wind tunnel, or the rapid making of multiple parts to try - and mostly disregard.
Newey is wrong though, in IMHO, yes it's becoming harder to find the killer features to innovate in F1, but hasn't it always appeared that way?
Every few years Adrian becomes bored with what he is doing with a particular team, now his threshold has been passed at RBR so instead of moving to another team he is defending his sideways move to other projects with this swipe at F1's limited horizons.
I wish for once you'd just admit your bored with what you're doing Adrian and move on, I don't remember Ross Brawn blaming restrictive F1 regs for his fishing sabbatical.