Thank you, I will give it a try and let you know the results. 
EDIT:
Results: Yes and no.
I attempted the Content folder from the shooter demo. I placed it in the Content directory for StarterContent – (which I backed up first)
I started a new project, and selected “Add starter content”
It took a LOT longer to build assets, etc. since it was almost 1.5GB of data to copy over. Then, I received a lot of script errors looking for scripts in the /Game/Assets/ folder.
I then closed and reset my StartingContent folder and ok now.
So I would assume this:
- It is better to export and import specific items to keep directory structures, etc.
- Only copy the items you want, not everything…because it has to load every single thing/build all assets/etc.
Now some of this could be because my machine is a little slow, so you might experience differently…but I’m guessing if you threw EVERYTHING in there…you would be sitting for a while, since it has to copy over and build all assets for your new level.
Maybe if they put them all in one folder and organized it so you could say click IMPORT and then go through like the directory tree and find the assets you want to use. Like a Master Assets catalog or something.
But I would not recommend just loading every single piece of content into your editor every time.