I have to say that Lex getting killed off is a good thing. I find his character deserving horrible things happening to him. Only one story did I find the ending unsatisfactory. In his attempt to infect Lois with HIV he is in fact infected. Then he is shot by I believe Gretchen Kelly. I thought it would have been a much more fitting end to have him live. Have it become known to the world that he was infected and how it happened. Then for him to quickly contract the disease and die a slow death from it alone. For a fictionaly character we all love hating it seems a fitting end that one of his own diabolical plans should bit him in the butt and get him.
I don't wish that on any real person and those who have contracted HIV they have my sincere sympathy and prayers.