So I was Using Picard today to do some library management. Love this software. Been using it almost a year now.
I find myself missing a feature that I have had in similar tools before (media monkey, amarok 1.4).
In these tools when you hit the button that merged files into your collection using the filemask (save in picard) it would give you the "from" and "to" file locations of all the files being moved so you can verify there is no mistakes. I find the two Examples in the file naming option dialogue are not helpful when playing with edge cases.