The knowledge that a network could carry out such a widespread and well-coordinated attack without being preempted, in a situation of maximum alert, will heavy on the minds of any French citizen regardless of whether victims were 118 or 119. Basically, the French security system has been revealed as completely ineffective. That is a huge problem.
And there's little the state can do about THAT. they can't send war planes to the banlieus -- it's a lot easier to play tough and send warplanes somewhere else, ignoring the local problem of the ghethos.
And I don't have a proposal to make it all better either. It was an unsolvable problem already in france when I grew up there, and there's very little that can be done that hasn't been tried already.