Indeed there will be such tools. It is required as the format is undocumented binary.
The reason some attackers manipulate logs with sed today is simple because it's possible. They will use another tool when it's not.
I hope some of the proponents of this proposal would answer the details about remote seed logging and what problems this would solve as opposed to simply remote logging. This part is completely left out, and I still think the misunderstanding is on my part as it is simply a much too ill thought out proposal otherwise.