In my opinion, the S7 finale was better for Lex than the S10 finale.
Of course, the S3 finale, where I still think the series ends, was best of all. Lex had been caught in a seemingly unsolvable dilemma: trying to defeat his father without becoming his father. In the S3 finale, he achieved that.
But there are still Lex-minion ways to spin the end of S10. After the
clone-Lex has his memories wiped, we don't actually see him doing anything evil, or see anything of his relationship to Clark.
What do you folks think?