It Would be interesting to see that part of the Alpha Quadrant and the new locations there. They could put Delta Volanis cluster in the top part of that new sector block. Thinking about it...they could put all the clusters/nebulas in their sector space as they're all in the wrong places anyway.
Here's a pic from the Star Trek Star Charts where i've illustrated what we have already in white and that missing block in red
wow, looking at that picture i realise how much of it Cryptic used in order to create the maps
but i think that will come eventually...once content for that new block will be developed, then it will be opened....until then...well....itll stay how it is now
Understandable though considering it's the only credible Star Trek galaxy map out there. If you look closely on STO you'll see these maps plastered everyhwere. Hopefully the galaxy will be expanded some day