After spending a bit of time going through the descriptions I started comparing this to similar supplements. The ones done by Jon Brazer in the Foreven sector seem to be the closest comparisons. I believe that the description needs to be beefed up in the CRB, not only for the sub-sector overall, but for each planet as well. Or at least the ones that make sense. A planet with just 5,000 people in a single dome is not much of a source for adventures. Now the planet that has 8 million people in it living between the light and the dark, well right off the bat that reminds me of some of Frank Herbert's novels. And that is some interesting fodder for adventure ideas.
The reason I mention the JBE work is that he provides about half a page description of the planet, a little background and some high-level adventure hooks if you read into things. The CRB has very specific adventure hooks with a patron and payoff and everything, but they are kind of light on the planet background. It would be nice to see that beefed up a little bit. But it would be most welcomed in the Sindal sector itself received a more in-depth writeup.
In my view it's just too minimal right now. It's supposed to be a core place to start adventuring in, and most RPG's lay the history and people data on pretty thick to pull the player into wanting to play there. Otherwise there doesn't seem to be much point to it. If it's a crossroads of Aslan and Imperium, the only Aslan mention is a dad looking for his son. And even that patron encounter is not setup very deeply. Is the patron encountered ON the planet, or elsewhere? I don't expect to be spoonfed all this stuff from the books, but gee, it's nice as a ref OR player to have some of this already spelled out. THEN it's up to us to tweak or use it as is. But when you start with almost nothing then you really have nothing to lose by tossing it out completely and starting from scratch.