I just make a simple GUI for ExifTool GUI as a Lightroom plugin. It didn't do any special thing. It just generates a command line and call it from Lightroom.
I also write an ExportFilterProvider that call Exiftool, so it can handle more meta info. I like this provider very much. If I want to export images from Lightroom, it will not export the makernotes. But with this provider, it can copy them from the source images.
I hope you will like it.
http://chaoliu12.wordpress.com/fullmetaexport-lightroom-plugin/ (http://chaoliu12.wordpress.com/fullmetaexport-lightroom-plugin/)
Thanks. I've added a link to your plugin from the ExifTool home page (https://exiftool.org/index.html#related_lightroom).
- Phil