The LONEx tickets have 2 bags as their allowance -- a big feature now, I suppose. Weight limit does now vary by airline, with 50lbs (23 kg) on AA, however it is loosely enforced esp. if you have Emerald status. I think all the other OW airlines are still at 70 lbs/32 kg per bag.

Any ticket routing through US/Canada gets the piece system, and all other tickets are on the weight system. Luckily the OWE rules specify the piece system, even if you avoid US/Canada -- a big advantage of this ticket type.