Im in aggreement, the Brawn BGP001 to the Mercedes MGP W01 was a massive change in philosiphy.
*Adrian Newey opted for a evolution of the Red Bull RB5 for the RB6.
*Ferarri changed their philosiphy for the front end, integrated the DDD, but fundemantally they "fixed" the F60 and called the the F10 for my liking.
* McLaren changed philosiphy, fundamentally as the MP4/24 was a dog to the MP4/25.
* Force India just updated and evolved the VJM/03 from the VJM/02
* Renault changed the R30s philosiphy, but ultimatly produced much the same as Ferarri in their own style with from the R29s DNA, but only fixed.
* Toro Rosso, essencially a overhauled STR4, but the STR5 is now showing menace and promice to what the STR4 was.
* BWM Sauber did what Renault and Ferarri produced a fixed and integrated C29 from the F1.09s gene pool.
Brawn/Mercedes went and changed a whole lot from the championship winning car of last year, when all they had to do was update and evolve for the new regulations. Im sure that if they evolved the BGP001, the W01 would have been alot stronger from a baseline that it currently is, posibly up there with Red Bull.
What ive learnt is philosiphys should really only last two years, sometimes three if you can get away with it. Take the cars from 2004-2009, the best of that bunch evolved from one the year before the domanant Renault R25 and R26 was evolved from the R24, the Ferarri F2007 and F2008 were evolved from the F2006, the McLaren MP4/22 and MP4/23 were evolved from a long line of cars going back to the MP4/20 to a point. I think theres some Honda attitudes in the Mercedes team that need taken away, take the Honda RA106 for a case study, that car should have been taken and evolved and matured in 2007 and 2008, but wasnt. Both years the Honda team wanted "fresh sheet" designs that were fundamentally flawed on many levels. BMW Sauber have been the closest in recent years to getting it oh-so-almost right with the F1.08 being evolved from the F1.06 using the evolve and mature philosiphy. If Robert Kubica had gottn his way, and BMW were have to have kept development on all the way till the end, im sure there would have been a 3 way battle at the end of 2008 between Hamilton/Massa and Kubica. There in that lies my point. To developp a good car, you need a long term view, one where you design and get the baseline in the first year, improve on in the second, mature in the third year. As Mike Gascgoyne said at the weekend in the BBC F1 Forum, its all about getting the ballance right, something Brwan/Mercedes have lost in transistion and translation. For me, Mercedes should have made this the transistion year, calling the team Brawn-Mercedes, basically pulling out of McLaren, but starting the groundwork for the 2011 season, where it would have been called Mercedes. Putting Heigfeld and Rossberg in the seats, with Michael in as "special advisor" before coming back in 2011 for two years.
All this is my personal view.