Rafale Weakness
The albatross around the Rafale remains its relatively unproven stature, and of course, the fact that it hasn't ever been exported. As one of the most expensive (flyaway cost) aircraft in the sweepstakes, it also comes with possibly the largest price-tag in terms of total contract cost, though Dassault has made strenuous efforts to convey to the IAF that its use of Dassault aircraft over time, particularly the Mirage, will significantly erode the total commitment necessary in terms of new infrastructure. Obviously, the IAF isn't buying this -- they're treating the Rafale as any new aircraft type. There are almost no articulated weaknesses in specifications, though the IAF is anxious about an aircraft that has been fielded for a lot of competitions unsuccessfully. Finally, the government has recently awarded France with the huge Scorpene deal. Awarding the MMRCA to France would be politically too much for too little. The leadership of Nicolas Sarkozy doesn't half do what Jacques Chirac's did in its time.
LiveFist - The Best of Indian Defence: MRCA