There's no doubt that the 2010 formula doesn't suit Schumacher. But you must bear in mind... the 2010 car is worlds different from the 2009 car... add the no refueling rule and the different tire compounds, and
everyone has had to do some adjusting.
If you want the most damning analysis possible of why Michael is underperforming:
http://news.bbc.co.uk/sport2/hi/motorsport/formula_one/9037790.stm
Splitting the season into the first seven races and the second eight, Schumacher qualified an average of 0.136secs adrift of Rosberg in the first 'half', 0.359secs in the latter 'half'.
^that just about sums up how he's improving as the season progresses. And he should... whether or not the car suits him. Because:
...in the past Schumacher has adapted brilliantly to understeering cars. He used to adapt his style corner by corner, lap by lap, to whatever was appropriate.
He was quite brilliant, for example, in how he could adopt a very aggressive style on his first lap out of the pits to get the tyres quickly up to temperature, then adopt a totally different style as the rubber came up to its correct working range.
There are several drivers who've had to adapt to new cars and new situations in the past few seasons and in this season. Alonso had trouble at first with the McLaren, then went on to match and nearly beat Hamilton. Now he's in Ferrari and he's driving the pants off of Massa. Button has had trouble getting to grips with the McLaren, but there are times when he is close in pace to Hamilton, and he's growing into the car.
Schumacher, on the other hand, got better with the long wheelbase car, then Nico
adapted to it and started beating the pants off him, again. It's Schumacher's lack of adaptability and flexibility, also seen in how his pace deteriorates as the car's balance changes over race distance, that is the most troubling.
The driving style was a mere expression of a level of feel and balance - a miraculous combination of inner ear sensitivity to lateral accelerations and the co-ordination of that with his limbs - that was on a different level to anyone else's.
His 2010 performances have revealed that sensitivity is dulled now and that his adaptability is not what it was.
There's no argument that Schumacher is one of the all-time greats. But we're talking about Schumacher 2010, not Schumacher 1993, and whether he still has the ability to be a front-runner. The answer seems to be: No, he doesn't.
I suspect he might do better next year, but I don't expect him to be faster than Rosberg.