The obsession with finding any form of afterlife, although for the Tamara avatar being unable to die seems more like a curse.

Yes, for beings in the midst of a war, constant resurrection is convenient. But as a constant state of being?

All the adult characters in pursuit of their lost children, their childhood, their future their past as if seeking to bring it all into some eternal present.

Hmm, I like that observation.

but Zoe’s inability to judge the physical capabilities of her robot self feels like something differen

I don't know. A young girl not realizing her own power seems a pretty standard idea.