We hit fifteen last night and were able to access the "Construct" zones. The Constructs are basically an arena where special mobs are present and PVP is enabled. The Constructs are in essence, earlier versions of the Matrix that are available via an Archivist.
Arrival in the Yuki Construct.

These samurai types were scattered all over the arena.

We didn't run into any other players to fight while we were there, so we honed our skills on the npc's.

A couple screens from an earlier session:
Exploring the International District.

One of our missions brought us before this Merovingian beastie.