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One of our goals as a group is to ensure that these current events can never be repeated. One large stakeholder should never have been able to take control of the chain and the witnesses should not have been able to freeze funds. Now I support the witnesses because they were effectively responding to a Sybil attack, but the point is that they never should have HAD to respond to such an attack.

Wouldn't just adjusting the witness voting parameters on steem be more sensible than redesigning and creating an entirely new blockchain? Not to mention that if you do this successfully it likely kills the steem blockchain and any value associated with it (regardless of what you say about steem theoretically being able to adopt the changes).