My word, there's a "penis size" tag now? That can be added in the settings.json file.
There is a workaround for "is missing" tag. Since multiple filters can be run at once, selecting all tags under the "has none" filter can do it.
"Is Missing Portrait" etc. should be added in 1.8 or 1.9, along with the search function and an explicit "is missing" tag
Thanks for the feedback