Yeah, I'm not sure how the rules work. I like having a coherent explanation for time travel so that it doesn't feel like a cheap tool that evades consequences. That said, I think Superman sending Lois back an un-traumatized version of himself is a sweet and the kind of sacrificial act of love I imagine he would make. Especially since it means he kind of embraces the "you can't go home again" sentiment. I am curious to see if this version would pop up again in the future as a cameo.
A bit uneven but I still enjoyed this series and I think we are all agreed he writes a fantastic Lex.