This is truly a tragedy.
We might have been well on our way to avert Gotrek's tragic fate thanks to that cushy clan membership & guild position at K8P getting him away from the environment that would have lead to his slayerdom. And all that thanks to sheer dumb luck of him being the one designing the steam wagons.
And then through that very same dumb luck his life is cut short. Not through enemy action. Not through heroic sacrifice. But quite literally because 'Rocks fall, everybody dies'. It's Abelheim's glorious last charge all over again.
Anyway, back to the expedition. Whether we press forward or turn back, we lack the food capacity to do so without foraging. The Nomad Tribe we had the food deal with lies just ahead, so we will be able to recover the food we'll use up reaching Karag Dum, so pressing on should be net neutral.