It is not necessary to explain how every piece of technology works. It is boring to listen to the details of yet another FTL system. I want to get to what makes your scifi special. 

Gloss over the details if the not-quite-warp-drive it helps the plot. But restrict the real heavy-lifting to that special piece of technology that exists in your universe but not in other universes.

Even then, there are different hardnesses of  scifi. The lighter kinds don't even bother explaining the new tech. That is simply not what Star Trek is about.