That subplot with the rookie team is pointless. It doesn't bring anything to the story, we already know the MC's more powerfull than E rank adventurers, and she doesn't even save them, nor did she go there to. The whole part with the low rankers could be removed, and nothing'd be lost. She still would have gone looking for her daughters' stolen gift, killed the dragons and shown how strong she is, without inflicting on us the whiplash of a wannabe-goblin-slayer scene totally out of place.
Feels like a "paint by number" scene, only there because others do it without understanding why they do it.