What an evocative depth crawl! I love when memories and relationships are mechanized as a type of HP bar, so the Rapture mechanic makes me punch the air in excitement. This is a great interpretation of your title, and I love the imagery of burning away the memories of loved ones mirroring the burning of the Forest as fuel for the Envoy's vessel. Having locations in the depth crawl that draw upon the PCs' memories, like the recreation of their village, is the icing on top, giving a weird and unsettling character to the terraforming process and gives the players a hook to get the Envoy to understand their own bonds and love.