Not sure what to do with this. Personally I found the D'ni writing frustrating... I tried to translate the letters I found lying around Uru but I gave it up because it was taking way too long. So while you could have it in there, you may want to have it more as an optional reward--not the main reward for finishing the puzzle, and not necessary to the solving of the Maze.
To enhance the mystery involved in this you could have notes from DRC explorers, translating the different signs on the walls--only they're not sure what to think of the word for what's at the center of the maze--as you say, it could be a threat or it could be a treasure. Provide hints throughout the maze--crude wall paintings, etc., and then at the end the player can decide whether to open the central chamber or... leave it locked, I guess, though that seems anticlimactic. Maybe something else, something that rewards them while leaving the vault closed. Otherwise, who's going to go through the maze just to leave the door alone?