Just to add to the 'secret base'.
Yes, Arthur answered in a LS after Adamastor that everything had been found - so no new secret bases
Reported here (I havent watched it) that same was said about Hesperus mystery in Tues SC News
Fits in with most other stories that just kind of end even if left open or 'survivors' etc - they just fade away
However, there are plenty of known abandoned INRA bases, in the right area for the route from CSN and beyond, even one 'between' route from Adamastor LP and CSN but way off the planes of the routes. They generally spread around the bubble though so that could apply to almost any route 'parallel' to or around the bubble.
So if you want you can imagine / pretend that they were going to one of those bases, whether they were INRA or Azimuth or whatever at the time and got re-branded after INRA took over....but they just didn't mention it in their logs, they all tell their own story, already written. To me personally seemed a missed opportunity not to just say 'We are heading to [known and named] base'* and that would have completed the circle and made sense without adding assets but still left no sign at all or ongoing story at that known and named base* so might have been worse for some players. Also INRA not officially tied to Azimuth yet so would have added a maybe unintended or unwanted link, especially if thats not how they playing it out, but yeah would have made sense to me.
*No spoilers, not naming the bases here.