Looking at the pics on the site and a couple of notes:
1.) Maintenance on facilities
http://www.malfador.com/SE5scr004.htm
There aren't any currently, are there? Would make a resource limited game quite interesting.
2.) Asteroids - Occlusion
http://www.malfador.com/SE5scr006.htm
I guess that will replace "condition" allowing only certain size ships to pass through the sector? (Can you hide a fleet of smaller ships inside?)