Flows: a node to control the weight in % from the original, to allow you to accept a certain range of compression ratio.
This is a good ieda, log a issue on github and Ill try squeeze it in.
Libraries tab: show number of files for each library, the percentage of h265 and h264, show list of files.
this is trickier than it sounds due to how FileFlows is designed, where it doesn't know what a video file is, the Video Nodes plugin does that. There is already a ticket logged to make some generic statistics that plugins can record info like that here
Files tab: some prioritization functions, such as the ability to process larger/newest/a library/etc. files first.
Something like this is already on my radar and I'll be adding something like this soon.