This feature already exists on MCM. Basically it’ll allow people to link one or more Minecraft account(s) to their Revenact account. Some verification method would be required, like joining a server and entering a command.
You can easily disable or simply not use certain features. It's all down to whether you setup rank-syncing/all that stuff in the configuration and permissions.I will check it out, but MineSync seems to be for Minecraft servers themselves. Ranks are sync between the server and the forums. I am not sure if it is the right solution.