Do not paste on enter, just copy it (I'm aware of the option "Just Copy" but how to change its shortcut to "Enter"?).
You can probably set that up via the CAG:
Do not store duplicate entries, especially if copy is executed multiple times in sequence.
Unfortunately this is more complicated than it sounds as BTT does not really look into the content before you open it. There might be very slight differences in copied content that can be hard to detect. I could add it for very obvious cases though (e.g. if the md5 of the complete content matches).
Possibility to edit the entries. Something like in Raycast - edit screenshot in respective app, edit string within BTT for example.
This is already one of the most important features and has always been possible 
Different search/find options, like fuzzy, strict etc
Definitely coming soon!
Find text on screenshots.
Good idea, however will increase cpu usage as BTT would need to load and OCR every image. Currently OCR is only done when an image is viewed.
Open on mouse position.
Definitely coming soon!
Close/hide on click outside
This is already possible, can be activated in the settings
