Firstly, why not book something for W21. Helga still hasn't cleaned up Winter. Target especially FRA-MUC feeders and integrate those in your ticket. It's a doddle to work out what will be cancelled. If you're quick you can book somewhere that will get cancelled today and you'll have a ticket you can use anytime. Its unlawful to force award availability for cancelled trips (EC261). You get a flex ticket. Its zero risk with the current rebooking rules.
Secondly, given Carsten is so concerned about sustainability, I presume that while encouraging their Members to donate their Miles to slowing down the climate EMERGENCY, expiring miles will be donated to the same fund?
That's tens millions of Euros that LH can donate to re-building the rainforests and focussing on persecuted (and sorely unrepresented among LH Group) Black and Minority Ethnic communities who are the most affected by the effects of climate change.