Defence wasn't great Seen but they did enough and deserved to win the game, the first game was never going to be easy and considering France haven't played a competitive match in nearly 4 yrs I think they did ok, Deschamps made a few brave changes during the match which worked and with hindsight should now see where his problems lie, i.e. in defence and do something about it.
With a few more games under their belt I can only see France going from strength to strength in truth, as their big name players like Pogba and Griezmann join the party instead of being subbed.