So UA was not able to confirm the PQM-postage for the LH-flights?
UA website shows 50% earning for Basic Economy on UA operated flights, but still shows 100% for LH as of January 1st. So I'd guess LH-flights should still be good for 100% PQM, even if it's the light fare.
https://www.united.com/cms/en-US/mar...spx?itemid=298