It all depends on the program you are wanting to earn the points/miles with. You have quoted the AA earning rates for L fares on other OneWorld airlines. There is no consistency cureently between OneWorld airlines and the L class earning rates. But it does seem to be heading towards greater consistency - but I hope we don't get to the point of nothing for L fares on any airline .

As an example of the variation, in the QF FF program, L fares earn discount economy Status Credits and 1 point/mile on QF, EI=0, AA=50%, BA=25%, CX=100%, AY=100%, IB=100%, LA=100%.

Note that due to the way we all like to maximise our mileage on xONEx fares (my included), the LONEx fare is probably the deepest discount fare on a per sector basis. So I understand why the airlines are wanting to restrict the points/miles earning on these fares. I might not like it, but I do understand it.