I'm not worried.
That first half performance featured England playing with all the intensity and focus of a team doing a training drill while France looked like a team who badly wanted the win. That was the main problem and it's easily fixed. It won't happen at the World Cup and if it does, players should be invited to individual performance reviews with Rowntree, Farrell, and Mr Rubber Hose. Everyone knows England can show better physicality and skills than that.
We are probably not going to face a scrum that good throughout the entire World Cup. Coming second best to France isn't a gigantic issue and we got more out of the French scrum than we did against Wales in 2013.
We can disrupt opposition ball when playing at a good intensity. Our own ball will probably remain a little dodgy, but we get enough of it to work with as a rule.
The only things I'm worried by are the lineout, which has been consistently bad for a while, and discipline, likewise. I'm seeing people blaming the hookers for the lineout and when five hookers have problems over seven games, the hookers are far from the only issue. The calls and movement are too easy to read.
There are positives. We handed them the game on the plate, but maintained our defensive structure well enough under the pressure for most of the game - only one try and three clean breaks conceded - and once we started playing, we attacked strongly. This England team can break more or less at will. I'm not sure that's enough, but it's something. I don't think the 6N team would have defended as well, people are talking about bringing in Attwood but Launchbury and Lawes brings a huge defensive upgrade.
Ultimately I'd send out a similar team against Ireland with a "Stop The Stupidity" ultimatum ringing in their ears and then, if that doesn't work, rejuggle for Fiji.
I'm pretty angry, because I don't like England playing like crap, but since the reason is obvious and we all know they can do better, I'm not worried.