Anilji well i do understand you want to eveolve a unbiased justice system, but everthing under the hood will destroy the belief in the system, as autocratic , dictatorship type.
Thus a few suggestions, if you are really into eveolving the feedback justice system, take it on the paths of the current prevalent justice system around the world in any democracy.
1)Reveal all the outcomes of the cases, once decision comes out in community, like daily cases, Results and by what majority they are lost or won, no need to reveal the jury and also what all 8 jury had to say before closing in the favour or against the favour of the seller/buyer.
2)This way precedent judgements will be evolved and after sterotyping pattern eveolvement, a buyer or seller, can directly refer to past justice or judgement meted out in a similar case, and that will help the jury as guidelines to compose their decision.
3)Also this way we all will feel that the jury is not rigged too, as we will know, what the jury/community feels the sellers should inculcate values in the new system
4)And accordingly a new code of conduct will evolve, which will be easier, and on that basis, seller or the buyer will also know which path to follow while dealing or leaving a feedback, so it doesnot violate the code of conduct of the community.
5)Each and every case is different, but it involves the same limited issues, dealt in different avtaars, and the judgements will always be same for particular kind of cases, this way a good knowledgebase will also evolve and it will become simpler for the appealant and also the defendant to put forth their cases.
6)Also cases where buyers donot want to defend their negative feedbacks, should be called EXPARTE cases and closed in the sellers favours, as if the buyer is not concerned , then why are the entire jury and seller, unecessary wasting resources JUSTICE SHOULD NOT COME CHEAP AND SHOULD BE METED OUT TO WHO DESERVE IT.
7)And if the jury have flawed tremendously in some cases, there should a spearate link for last relook into the decision and the entire community can do mass voting on such a case online.This way noway any injustice will be done to any buyer or seller, and all the mischiefs of the seller or the buyer will come in open, and agood healthy society will be born.
8)This way the sellers will also not take cases to community court which they have grossly erred in and try and talk it out the buyers, as to keep away from bad publicity and buyers will also act as gentleman, now currently as nothing is in open this CRF cribbing will unending abyss.