Maybe they're taking it easy because all the boxes are ticked - did SB deprive JT of his liberty, did she zip him in a tiny case where he ultimately was unable to breathe and died of suffocation, did she prevent him from trying to escape the tiny suitcase by battering his fingers with a baseball bat, did she further also assault him causing severe injuries to the point she bruised her own hand using the baseball bat, did she mock and deride him, did she fail to call emergencies services, did she subsequently use her phone to make calls but not for getting help, did she sleep very well for a long time, did she wake up and then ring her ex husband three times but fail to ring 911 once...
She's quite literally admitted to all of the above multiple times on record and now in court to the jury. Is any jury going to find in her favour that this was all an understandable course of action if her and JT weren't getting along? I would sincerely doubt it.