I’ve been working on the UI some more today at home;
The tool is already working, I’ve used it a few times here and there…
There’s still some more things I want to implement though (copy functions signatures + local function variables, etc), but the basic functionality is there:
After picking properties you need to copy to target classes, the ones show in green will copy successfully;
Orange ones are conflicting that already exist on target and red means it wont copy even though I moved it to target (right panel).
Once you click “Apply” button, the plugin will copy green properties + compile the target Blueprint + ask if you want the changes to be saved on a popup.
If anyone is willing to help me hunt for bugs before I publish the tool, would be great. PM me 
I will not charge for this, no worries; there’s only a few thousand lines of code so far.