Hello @Woodstcok, thank you for the feedback and welcome to the forum.
This could hardly be called a flaw, since, as discussed above, FontBase does recognise duplicates and will show them in a list once you go to the Family page of the specific font.
As for bulk deleting duplicates - you can use the same Family page to multi-select the undesired duplicates (users might not want to delete all of them at once after all) using Ctrl/Cmd+Left Click, then Right Click to bring up the popup menu and delete the files in your system.
The more automated process is in the Greenlight category, as the top post indicates, and is being considered for future implementation, so we are in the process of sorting this out:)
Hope this helps,
Thank you again,
Yuriy
FontBase Dev Team
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