The best thing for society would be to bar any and all contact with Jodi. Unless that happens, there will be more victims. They may not die the cruel way Travis did, but they will be victims all the same. People like Jodi (whether you prefer calling her a sociopath, psychopath, or simply disordered, likely comorbid, cluster B) seek to destroy, own, covet, manipulate, control, coerce. Comorbid (not borderline) cluster B's have the potential to be extremely dangerous. (Not stating all are, of course, but she's rather proven herself on that front, hasn't she?)
Death penalty, LWOP, LWP...the sentence I truly wish could be handed down would be a permanent no contact order. No one for her to threaten, manipulate, guilt-trip, no mind games to play on others. That, for her, would likely be a fate worse than death.
JMO and FWIW