Currently none. My advice for that is not violate TOS if you have a disagreement with someone. Some memers have had success emailing
[email protected] if they've been downvoted maliciously and haven't broken TOS.
I let them know the current system is broken and abused, and there's a chance a better system will be put in place. They seemed receptive to my suggestion, but when, if, how and with what changes is all unknown.
Since I ultimately don't know what their plans are I don't really want to say much else since it there's always a chance it won't happen at all.