While exporting blueprints to text files is great there needs to be a possibility to import all the exported blueprints back from FACTORIO\script-output\KBlueprints.

So we can finally easily take our blueprints from one save to another.
I got something like 64 blueprints now and its a pain in the ass to import them one by one every time i start a new map.

One button to import them all, one button to find them,
one button to bring them all and in the factorio bind them. :-)

God, I'd LOVE if that was possible...
Sadly the API offers no option to read files. We can only write them :\
So, sorry, but won't gonna happen :(

So is the recommended method of transfering a bunch of blueprints the Export All and Load All buttons?

Exactly.
Be careful though, because of how the game is written, it will crash in multiplayer when you try to import a big string. This bug is reported, known and will be fixed during the big multiplayer rewrite in 0.14