Is the WoL actually good though?

[Theodric]

Or it's because Halric and Ga Bu are harmless while the broodmother is out ordering war and murder.

Before a cure was developed for Tempering the Tempered were not considered to be harmless as they would inevitably try and work towards bringing forth the Primal that they were Tempered by. Tesleen died in large part due to Halric, from what I recall.

It took time, effort and resources to isolate and care for both Halric and Ga Bu. Personally I think a pregnant woman is exactly the sort of individual that the Warrior of Light and Scions should have moved mountains in order to save. Sure, it would have taken a lot of convincing and not necessarily even worked but it always made me raise an eyebrow at how quickly she was written off.

Furthermore, the territorial dispute and war was only escalated as a direct result of the method of arrival for the Scions. Namely Bismarck's magical bubble.

In the end, I don't think the circumstances matter all that much. At the end of the day the Warrior of Light and the Scions put down a pregnant woman and that, to me, places them firmly in the 'morally grey' category in my book. Which isn't the condemnation some may believe it to be but rather a reflection of reality and forced hands.