Wow, they're thinking the first (of probably several) bounces took ~2 hours and reached ~1km height and ground range. All from a first contact at barely 1m/s. Weak comet gravity is weak!
Having done Gilly landings in KSP, I can totally appreciate how nerve wracking this situation would be, combined with the half hour time delay...
I suspect, though, that they are wishing they had included a back-up power supply...
Nah, that would add weight to a system where every trimmed gram is precious. You don't need back up power if the landing goes as planned, but the landing didn't go as planned. Unfortunate, and I'm wondering what they will learn about the faults of the harpoon tethering system.
At least the lander is still functioning and in contact with us, and capable of doing good science. The situation is far from completely lost. Something of a miracle after all that. Here's hoping they can achieve a more optimal orientation for recharging. Then getting properly anchored would be a huge plus.