I have a theory but it's something I'd have to explain verbally. Basically, I believe there is a great puzzle at work on Venus. Notice all the bright blue and red light-streams flowing in certain directions. Notice all the seemingly inactive Vex Gateways in different parts of the path that leads to Zadron's gate. There's definitely a puzzle that needs solving on Venus. There's also a hidden room in the Vault of Glass if anyone ever wants to hit me up to check it out.