Today's race just confirmed for me my position on DRS and KERS. I had been warming up to DRS but in the main I feel it has either led to artificial overtaking or artificially disadvantaging drivers from breaking free of time wasting dog fights to get on with challenging for positions ahead. Lewis's need to drive defensively must have cost him time. Numerous times he had to break the tow using his KERS only for it to be negated by Webber using his later and then having the bonus of DRS to rejoin the battle. The reason I see DRS as the bug bear is because the drivers have been given a tool but not the freedom to use it when and where they decide to use it. That's why I like the F-duct, it was a device in the hands of the driver and it was up to him to make best use of it.
The FIA should take the gloves off DRS for at least two races to see what happens. Then if that doesn't work, get rid of it.