Sci said:To me, the most immediate answer is that Soji could have taken most of the role that Tallinn played. She could have been the primary cast member Jean-Luc was siloed off with, and she could have been the one to journey into his mind and help him through coping with his mother's suicide. Tallinn could still have been in the series in a less-central role that would have been more appropriate to how little we learn about her as a person -- she could still have been the one to sacrifice herself for Renee, for instance.
I don't know. Soji the equivalent of a 20-year-old. I don't know how much I buy someone who's effectively 20 guiding someone who's pushing 100. I think the guide had to be someone who looks like they've lived life and has some wisdom and more maturity. Tallinn fits that role a lot better than Soji.
I don't entirely disagree, but you'll notice that I didn't say Soji should "guide" Jean-Luc. I said "journey into his mind and help him through coping with his mother's suicide." It's certainly true that young people often need the guidance and wisdom of elders. But sometimes elders need young people to call them out on their lifetimes of bad habits, too. It goes back to Jean-Luc's line from the end of S1 -- "That's why we're here: To save each other." Not Soji having all the answers and "guiding" Jean-Luc like she knows better than him. But both of them helping each other and learning from each other. Soji learning more from Jean-Luc than Jean-Luc from her -- but maybe Soji calling him on his bullshit sometimes when he needs it.