by taking away too much feel , meaning vib dampner can take away too much of the Good feel. meaning you can lose the Feel for the ball on the string. so that you lose control on the touch shots like Drop shots and spin shots. That is what Babolat struggles with every year with cortex. they are trying to take away ALL the bad vibration that causes ARM pain but keep all the good vibrations that give us feedback on your hands from the string bed.
Based on the all the complaints we hear about Babolat racquets causing elbow problems, I think the word "struggles" is putting it mildly!