Static complexes from level 5 and up (I think, could be 6) now move within the constellation they're in.
So all those 10/10 complexes arent gone forever, to roam the universe and spawn where appropriate(e.g. Serp complexes in Serp-rat space). Reason for this is ccp realizes that tons of infrastructure went up around these 10/10's (think cloud ring's 10/10 system that G setup for a while, then d2 took over for a while till goons grabbed it)
So, every 2 days, or immediately upon complete, a complex will move to a new location, preventging RA clones from whoring it out (or 'sploiting it)
Now, the 10/10's haven't changed and if you find the complex it will be the same as if you were running it as if it was a static complex, but the 10/10's will have some of the lowest sensor signatures in the game requiring a lot of time and luck to find.