I'm totally reserving judgement on the systems, this is a beta release for a reason and the purpose of the 282 systems hasn't actually been fully explained to us yet. For all we know this is simply a template for expansions giving modders, as DO and Dab have said, a lot less work to do when adding new systems into the Discovery universe. The currently un-used systems might be hidden once 4.81 final rolls around, I don't know, it's too early to start throwing your weight around.