What Lucifer Fans Really Wanted To See For Linda's Ending
Within the show, Dr. Linda Martin gives birth to Amenadiel's (D.B. Woodside) half-angel baby, and she goes on to write a book about her experiences. Unfortunately, this is not the sort of ending that fans were ultimately hoping for, and on Reddit, they have vented their frustration in a big way. As argued by Reddit poster FlightRisque, "[W]hen Linda was talking to Amenadiel about human problems seeming trivial after helping celestials...was that not the perfect set up for her to become Hell's therapist? Why did she do that dumb trope where she writes a book that ends up being the IP?"
Others also expressed their dismay over Linda's final story arc, with many agreeing that she should have setup some kind of extraplanar therapy office. "Lucifer" did set this up as a rather perfect avenue for the character, mostly due to her proximity, her career, and her close interpersonal relationships with both devils and angels. It's no wonder that fans were disappointed in Linda simply penning a book about her experiences — they expected much more from the fan favorite, and hoped for a truly epic ending beyond just being the mother of God's grandson.
Speaking of the Hell's therapist concept, fellow Reddit user throwaway098764567 added, "100% this is my head canon. I was hoping at the end of s5 that she would end up helping lucifer out down there and am completely disappointed that isn't what happened especially with her being bored with human problems." Another fan suggested that it would have made far more sense for Linda to become therapist to angels, mainly for them to better understand humanity.
Either way, it seems that the fan consensus is that Linda Martin should have had a far bigger and far more satisfying story conclusion.