If the Sentinel has done his or her job, then the seriousness of the Initiates is all that matters. If they pursue their Initiation, they will seize upon the Pylon for their needs. They can write rituals, lead discussion groups, make road trips to museums, set up mini-conclaves, etc. The Sentinel should not have a greater or lesser role in this than the others, and should use his or her office merely to be sure that no one person takes up all of the time. What Pylons do is up to them, the Temple's only interest in Pylons is that they share the fruit of their labors.
Pylons are a major tool in re-creating an Initiatory tradtion on Earth.
Each member should contribute to the magical Work of the Pylon creating such material based on his or her current Needs. The Sentinel should design Work for the Pylon to illustrate the major Initiatory questions rising out of discussion and to promote general good luck and prosperity for its members. The Gateway to your own Initiation is in your Heart, but often Hidden there by circumstance and habit. External Gateways are Symbols you can use in making your rites of passage. Most of the rites of passage you need in your life, you will have to create yourself.