To give credit where credit is due. I called LH Reservations to do all the necessary rebookings, and the agent was properly briefed about the route suspension.
He efficiently and quickly processed all the re-routings, including the tricky one that ended up as a double-open-jaw (as SN don't like flying on Saturdays).
Still hoping that LH can tweak their long-haul fares to allow BRU as a routing....