On level 8 of 24 now, and so far these maps are fairly easily navigated and also decently detailed. Not much is new, except some changes to a couple weapons and a new boss-like enemy. I am definitely going to enjoy the several hours of new content! (I don't actually know when these maps were made, but they are new to me)
Update: I got stuck on the map "endymion" (lvl 9) and had to cheat myself an uplink chip. Then, on the next map, "fission for trouble" (lvl 11; i guess i missed another exit from 9), I have an uplink chip given to me but can't find the "hidden" input slot. ????
Also, I hate vacuum levels.