What a cop-out. IMO, this resolution missed the entire point of the Legion character, especially as an allegory (? too on-the-nose to be mere allegory?) of mental illness. Farouk's presence in his head, his adoption, his sister! all shaped who David is. What a cheat just to call "do-over." And it's not like the visuals this season were so trippy as to distract from the repetitive and banal so-called story.
I would rather have seen David transcend the circumstances that made him rather than simply start over. It's boring. And I am sure people with mental illness wish they could start life over from the beginning. It's more interesting to explore how life can be improved with a shitty hand dealt.
ETA: What was the point of the robot stuff with Switch? And calling Farouk a robot? Huh?