Blueprint Screen Improvements - Add more info to info tab
I suggest adding more info to the info tab such as creation date, update date, and a list of missing mod blocks. There is plenty of unused space for this info.
Also blueprint folders are great, but could use some improvement. Having to open another window to select the folder is tedious and directory listing should act like a file tree and show folders in the same list as blueprints, double clicking should navigate to the folder and a link to go up one level in the tree, like most operating systems work.