Dude, this is friggin awsum.
One thing though, would you mind trying to place a few Necron Tomb Worlds in there? Makes me a little sad the race i play is totally unrepresented, though i can understand why; they arent exactly very placed. I am however rather sure that the "thing" that made an anomaly in Hivefleet Leviathans movement is a Necron Tomb World. I dont have my codex with the at the moment, but at the last page there are listed some "Dead worlds featuring Necrontyr structures" (which basically is Necron tomb worlds). I would love to see some of them placed too...