SJS,
The value of Akhtar lies in the psychological threat he poses to the opposite team and his ability to churn out wicket-taking deliveries at an extra-ordinary rate. Hence, with him you always have the chance of getting that 'one' important breakthrough, and at the death end of an ODI, wiping out the tail before it can do much damage. Which, if it happened today would have saved Pakistan 30 odd runs and a lot of mental headache.
Of course, he is also likely to go for some runs in the process, but when you weight in his pro's, the ability of the other bowlers and the quality of the opposition you will prefer to have a small chance instead of having none.
That said, excellent play by India. Sehwag was the building block, Dhooni did an expert cementing job while the tail exploded in a flurry of fireworks. What more could you ask!