Luxair have announced LUX will be upgraded from a Dash to B737 in October, just as FR start the route.
They never planned to operate 30 aircraft over winter. They will be busy now that German and Dutch has backed action and apparently most German (80%) are directly employed by them making it the situation far worse than here.
On another note, CX A350 scheduled last Saturday has yet to fly back, 5 days an counting most be costing them.