Only thing special in the core are planets I plan to take over 
I WILL OWN THE CORE
Actually that seems to hard now, I will divert my arcs I WILL OWN A SEGMENT KIND OF CLOSE TO THE CORE
Nothing particularly special about the core, except planet density. Less likely to have planet links, but more planets will fall under your PD and regional governments.
I'd rather have the fringe worlds: no flank.
