I've been thinking about this all week. There are a lot of threads and puzzle pieces floating around in my head, but I can't put them together in a satisfying way.
The most likely scenario I have is this:
The OXA machine is likely derived from Vex influence, like the Device created by Ishtar. That would explain how the Vex have data on it in the first place and why both machines are practically identical. The Vex are pervasive, so it's likely that the Psions have encountered them while they were free, or Otzot used Vex tech when they rebuilt it after its destruction after their enslavement. Using the OXA machine to guide them and the Sol Divisive's research, Otzot seeks to reverse-engineer the mind-melding technology used by the Witness (successful attempt) and Maya (failed attempt) to become a God-Thought, a term used by Psions (or at least a Psion under Caiatl) when referring to powerful psychic leaders. We already know Psions are capable of merging minds and even bodies. Tazaroc, Niruul, and Ozletc did this when they formed Inotam during the Season of the Dawn, using an "ancient technique."
This makes the most sense, but I feel like there are holes that I can't see. Either way, Micah's Ghost missions are pulling loose threads and using them to start weaving a tapestry. I'm excited!
