He still qualifies well and in the 2nd half of the season has generally finished ahead of Button. As No.2 driver, I can't see what more your can ask for.
Actually, if you divide the season so far in two (8 races in each half for the mathematically challenged) - in the second half of the season, Jenson and Rubens have each beaten the other to the flag 4 times. So if you're going to say that Rubens "has generally finished ahead of Button" you might want to check on your stats first....
Remember, the aim of the race weekend is to finish the race as close to the front as possible. There is no point in being the fastest race driver, when you are worst qualifer. Qualifying is integral to achieving the best position, in the final race standings.
There's also no point throwing the car off the road trying to be the fastest in every single session when you don't
need to win every race. And Jenson Button, the 2009 Formula One World Champion, didn't need to win every race. He just needed to do enough to maintain his lead after the BGP001 finished the bulk of its development cycle and all the other teams started catching up to it. The fact that he won the title with a race to spare suggests that he had enough in hand.
It would have been nice to see him at the pointy end of things at every single race. But even the much vaunted Schumacher had a 'mare on the way to his 2003 title, and Alonso's second half of 2006 wasn't exactly stellar. Neither was the way Mansell and Prost closed out their respective dominant seasons in '92-'93. Had his first and second halves of the year been reversed, no-one would be questioning his season at all. Except you, no doubt. I suspect you'd have been wittering on about how he wasn't a deserving champion because he hadn't led from the get-go....
I wonder what you'd make of the 1984 season sunama. Pretty much all year, Alain Prost out-qualified Niki Lauda. In fact, Lauda never got pole all year. Niki knew he didn't have the raw speed to take on Prost, but he had something equally as useful - guile. Prost concentrated on qualifying up at the pointy end, Lauda concentrated on race setup and strategy. The end result was Lauda racking up points, and managing to grab the title.
So to return to a previous point of yours:
There is no point in being the fastest race driver, when you are worst qualifer.
There's also no point in beating your team mate to the punch in qualifying if you can't do enough in the races
