I dont think there will any improvement will Brawn is there. Its one thing missing targets. Its another thing not owning responsibility, continually making excuses and lying about it for years.
The rust in Mercedes starts from Brawn. Bob Bell has failed 2 times already and Aldo Costa- Geoff Willis have failed bigtime. Willis joined in October last year. By this time last year he was with Mercedes & the car is bad. Costa joined in Dec last year. The whole exhaust was his idea. It failed & bombed. The gains from the exhaust are negligible.
I think with some talented engineers in Mercedes even marcush with a couple of months of training can develop a better exhaust than the one's at Mercedes.
Compare Ferrari & Mercedes. Ferrari had a crap cap, missing Q3, Massa maybe didnt even make Q2 at times. The car was off the pace & not good at all. Mercedes had a car capable of fighting for the win. Look at the development.
Mercedes have 2 Reasonably Good Developments. Monaco package which was good. Exhaust Package which bombed. Ironically both these were tested in In-Season/Young Driver tests.
Such a matter of shame that apart from 10 Dud Frong Wings Mercedes have had 0 Development Package for the races apart from malfunctioning bits once every 7-8 races which you cant even identify.
After this instead of quitting & hanging his head in shame Ross Brawn feeds the BS that they were understand tyres & what not.
How many Exhaust have Ferrari tried? I thin they tried 3-4 one's in Pre-season all failed. Since then they have tried 3-4 different one's with substantial modifications during the season. There's another big modification coming. If a team can try 7-8 different versions of an exhaust to look for downforce, and then you look at Mercedes, you know why they suck.
I dont think they would even have tried Coanda. But maybe they hired Elliot and he informed that Lotus were trying for Coanda since months & they did not want to look like fools as the only team without it so they made this sloppy version of it.