No. Finding the body in the house, with or without a ransom note, makes the Ramsey's appear damningly suspicious. This should be more than obvious to you considering the fanatical devotion the RDI bandwagon has toward believing the Ramseys guilty.
What should also be obvious is the fact that putting JonBenet's body in the trunk of the car, driving to a wooded area, and dumping the body, would have been the most obvious way of avoiding accusation, with or without a ransom note, compared to leaving the body in the house.
While you are correct that it would be the most logical, don't forget that the Ramsey's lived in a neighborhood full of neighbors. The Ramseys, if they were involved in the death of their daughter and were now wanting to remove the body from the house to decrease suspicion to themselves would have calculated the risk of one or both of them being seen leaving the house very late at night or in the early morning hours. To be seen by one or more neighbors leaving the house and that being reported to the police would instantly point to the Ramseys. I think that they wanted to remove her body but they thought the risk of being seen was too great. In hindsight, based upon the information provided by their neighbors, that would appear correct. Had they left the house that almost certaintly would have been seen and reported to police. What other reason would they have for leaving so late at night? What excuse/lie could they possibly give for doing so?
A devious mind trying to deflect guilt would have dumped the body miles away from the home, not in the wine cellar.
People in a panic very late at night faced with a very unusual situation do not always behave logically. Afraid to move the body and risk being seen, they resorted to "Plan B", which is that an intruder broke into the house. The broken window in the basement and the suitcase were staging to support that.
Whoever killed JonBenet did so with extreme prejudice. The evidence of methodical overkill is undeniable and glaringly obvious. Therefore, the suggestion that the murderer was too "frightened and in panic" to think clearly enough to consider dumping the body miles away from the home strains credulity to say the very least.
Here I agree with you, and this is one of the things that separates me from the RDI crowd. I simply cannot see the parents as being so callous and cold and calculating that they would garrot the daughter that I believe they loved.
It is the obviously brutal way that she was murdered that makes me seriously doubt the parents because I cannot see a parent doing that. While it could happen, most parents would be unable to bring themselves to do such a thing. But I will add this one caveat: IF a Ramsey did the garrot, it was certainly JR and not PR, even if PR was the one who caused the original head injury accidently. JR, a navy veteran who had seen many things all over the world and may have learned this somewhere, may have believed that doing this would be the icing on the cake to point suspicion away from the parents. He may have thought that most people would believe it unthinkable (like me) that a parent could do that. But, if JR is/was a very shrewd calculating person who was willing to do anything to save other members of his family from going to prison, he may have done it as pure staging. If his daughter was already dead and he knew nothing could bring her back now, then garroting her after she was dead to point to a brutal intruder would be a logical thing to do. Horrible but logical. JR may have been that type person.