I'm sure 4.06a might also fix other problems related to their server infrastructures. I'll just say 4.06a is some sort of preparation to move forward to 4.1, because once that patch comes out the servers are going to be awfully congested again, and SE might want to ready up and stabilize the servers as much as possible before opening up new contents. Other than that, PvP balancing continues and it's pretty hot in there.