Honestly, I don't know. Hard to cover all the bases or devise a perfect plan. Everyone makes mistakes. Anyway, I just thought i'd answer your question and staging is one theoretical answer. Theoretically speaking what would be a better plan? I agree when let's say believers highlight the ridiculousness or implausibility of hiding a body, moving it several times whilst also having dinner and acting normal and then transporting it 23 days later... And to do all this their plan would have to be very complicated, which is a credibility stretcher...
Thanks for your response.
The belief is utterly preposterous that for a brief period on May 3rd normal loving, family orientated parents morphed into criminal masterminds capable of disposing of the remains of their dearly beloved daughter with less thought than putting the garbage out and doing it so well that no trace was found either then or to this day.
All to avoid the accusation of bad parenting?? I think not.
I think you have hit the nail on the head with your last sentence. The more complicated a 'plan' is the more likelihood it has of coming unstuck.
Any scenario the 'doubters' come up with of necessity involves hindsight ... there is no plausible explanation of how they could have achieved what they say they did.
So why keep on saying it nearly eight years on ... in the full knowledge it causes distress?