Growing concern - but optimistic

[arthurtuxedo]

You could claim every system you saw in SE4, but it didn't really mean much since it couldn't be a part of treaties. In SE5 it does mean something, so it makes sense that MM restricted territorial claims to territory you actually have a legitimate claim on.

As far as the exploration goes, people have pointed out that you should be able to see the planets, even if it's just with telescopes. That's true, if the other system is fairly close by, but think of it this way: There are a maximum of 255 star systems in a game of SE5. There are hundreds of billions of star systems in a real galaxy. So for every system that is connected with warp points, there are a billion that are not. Therefore, it stands to reason that even a "neighboring" star system connected via warp point might be so far away that you can't see the planets, only the star.