I agree with every Temporalflux
Plus there likely another factor. There is probably debate within Dc about how much they want to be tied to this show. Some of Chloe's fans seem to want not just a version of her but something that shows this particular character and all her backstory survives into Clark's future. When the show itself has constantly teased that she could die. What if DC had introduced her as Jimmy's girlfriend...later to see him retconned to his brother????