PED in C is really not as high as in Y, you will hardly motivate company A to book a trip in C, because the fare is now 2400 instead of 2500.
Situation is comparable to post 9/11. Demand for business travel will not increase, because of any C class sales, but very likely we will see those sales in Y, at least from some airlines. The others might have learned enough from the past, a massive sale will only trigger an even more aggressive one by the competition resulting in a completely broken industry with Chapter 11 providing a solid safety net to sum up the US airline industry of the last 30 years.
Having said that, will be interesting to see what can be reduced and will be reduced.
And is LH making enough from the fuel spread to keep them from issuing a profit warning ??