Hello Brett,
Perhaps you discovered the solution by now, but I found the trick after experimenting few times.
When you intend to import a sequence from another project, simply make the following selection in the Import window:
Project Import Type: “Imported Selected Sequences”
Create folder for imported items: leave unselected
Allow importing duplicate media: this must be selected!
This works perfectly. I too had been endlessly frustrated by PP CC’s inability to import sequences without the extra bins, as I was exchanging projects routinely with other editors, and it was becoming messy.
Good luck!
-Al