Prior to the Desolation update I have been doing some research in an attempt to figure out how ‘regions’ are generated and where systems are located within. I have not quite finished my research as it requires a lot of testing. I did however find that so far every region and system actually exists, although it may not be visible in the galaxy map. I have been using the Save Editor to warp to these locations, at times ending up in a different system than shown/recognised on the Galactic map. It is as if these are basically ‘hidden’ from the ‘normal’ player, and only accessible by ‘other means’. As of yet, my testing has not been thorough enough to draw conclusions. If I can find some time, I will revisit my research on this, as I find this intriguing to say the least 
Yup, I have been wanting for this to happen for quite a long time now, as I totally agree. Not only is this risky, with various possible issues involved, it most likely also affects performance if they continue to force themselves into not resetting and continue to implement exclusions to prevent existing saves from breaking.