When Owen died, it was unexpected and in the midst of a PPV. They rushed him off as fast as possible, but just about everyone knew he was dead. The show did go on and that, was probably a bad decision.
However, you are mistaken about the next night. The wrestlers came out, they held a moment of silence, they told stories about Owen all night long and held matches in honor of Owen. No storylines were advanced or created. They did this for the better part of a week and continued it onto the next live show.
Friends of Owen's were allowed to go home if they wanted for the Monday. Most chose to stay out of respect for Owen, but mostly because they had no where else to go to mourn properly. Flights to their homes would have left them alone for hours and they had a built in support group with their fellow wrestlers and road agents.
Owen's death was shocking as anything and mistakes were made, but honestly, who knew exactly what to do when that happened? Everyone was in a state of shock and grief.