Soulslot unlocking did not require active effort from a Transcender, aside from the task of going through at least one complete mutation. Once mutated, the total extent of saturation became the upper limit of that person's unlocked soulslot. However, this upper limit was not considered touchable without burning off one's neural network. It was like glueing weights on top of a sheet of glass until it reached its breaking point. It might remain stable for a while, but one quick motion could leave it cracked and broken.
After a quick search on Murray's data terminal, Mir came to learn that the Neural Network Enhancement stat was a new addition to such status reports, virtually a safer measurement to tell the Transcenders where the breaking point of their soulslot capacity lay for the time being. It was more accurate than guessing, like he had done.