Too Human -
The door you rotate the stone toward in cyberspace, opens a door outside of cyberspace. These three rooms are entirely unnecessary to go into, but they do contain some useful items.
Once you are done going between cyberspace and those rooms, go into further down the area(outside of cyberspace) and go through the door toward the end of the room.
At the start of the next room is another troll. This time, there are also those annoying goblins with guided rockets close to the troll. Kill the goblins then take out the troll. There is a secret area in this room. The switch to open the area is next to the rocket goblin on the right. Secret areas generally are filled with higher level enemies. They usually have some decent rewards for either killing all the enemies, or killing them within a certain amount of time.
In the next room is another cyberspace well.