The title says it all.
Fire the FO, the coaching staff, bring in a new, competent GM and start from scratch.
They will be underdogs the rest of the way and will, at best, win one more game. Pack it in, play the backups and evaluate players and then strip it down.
The only way to give the fan base hope for the future is a complete overhaul. Anything less is a band aid and fans are too smart for that.
At this rate they wont sell out the new palace when it opens.