I posted this in Plot Discussion but I wanted to post it here also, as a response to myself.
If we assume that the Hymn of One has been Bree's religion since the beginning then there is one common thread that ties the religious faction with OpAphid (the enforcement faction) - Lucy.
My take is this:
- There are multiple factions within the Order
- The Hymn of One and OpAphid are two separate and distinct factions - independent of each other.
- Lucy is with the Hymn of One and acts as or acted as liaison with OpAphid.
- OpAphid was called upon by the Hymn of One liaison (Lucy) to assist with 'compelling' Bree to participate in the ceremony. That is why Lucy is seen with members of OpAphid in "Human Ransom".
- OpAphid failed to deliver and a rogue agent resorted to traditional (extreme) OpAphid measures in an attempt to deliver Bree.
- The Watcher stepped stepped in and "terminated" the rogue agent.
- Hymn of One (Lucy) terminated the 'contract' with OpAphid, deciding instead to handle matters internally.
- Tachyon has no personal interest with Bree - her vendetta is against OpAphid. To her, Bree was only significant while Oppy was interested in her. No more interest by Oppy means no more interest by Tachyon.
- Since Lucy has seen the videos from the beginning, we should assume that she sees them now. Whether she shares that information with other members of the Order is unknown - it appears, for whatever reason, she does not. Perhaps she has motives of her own.