It does seem unlikely that the Imprinter has not told us what the Imprinting machine does in full; Why it reacts the way it does, how it is able to provide LRC-V3 with a method of subverting terminals and reaching out to the Conduit Teleporter in Zion, and the nature of the Mark it gives Cogmind that is somehow visible to other robots, are all unexplained. There is simply a large lack of information on that topic.
Zion dialogue 60 does seem to be confirmed by A0 log. It would be interesting if Architect somehow erased the memories of the derelicts; the only reason I can see for this is to remove traces their existence from MC, although this does not seem to have been perfect given the mentioned dialogue, as well as another dialogue in Zion where a zionite mentions a robot capable of regenerating their core and parts.
The lab order about imprinter and her imprinting machine is... very interesting. This may serve as a
possible explanation for why the machine reacts to LRC-V3 the way it does, however subverting terminals and summoning Z-allies is inconsistent with that explanation due to A0 log L.K:
I haven't confirmed whether it's coincidence or not, but ever since LRC-V3 visited Zion, a variety of advanced technology of unknown origin has been leaking into the vicinity of Ob10. It seems like yet more intriguing events are taking place deeper in the caves. It's probably about time to send A3 on an intel-gathering mission.
This seems to indicate that the Architect is unaware of the Imprinters actions in deep caves, as well as the existence of the Assembled Gate and Golems, and so would have no reason to make the Imprinting machine give access to the Conduit Teleporter or the Z-factory. As an aside, there were also no unique logs in A0 for going into Deep Caves and using GU...
Whether or not Imprinter is one of the A-series...
maybe? Looking at her tile, she is not like the True Architect, nor like the A-series programmers; instead, she appears to be most similar to the assembled/z-unit faction in appearance, having a pseudo-organic and rounded appearance which is quite unlike the more square and regular appearance of derelicts and complex robots. However, we do know that there was previously an A9, from the Lab Reminder log:
Do not retain in memory the contents of any more than one single order at a time. On confirmed completion, delete the order and retrieve the key to decrypt the next. I don't want a repeat of what happened with A9. As per protocol, all orders from the previous cycle have been archived. If referencing past data is necessary, wait until our next scheduled rendezvous and request it then.
This, however, implies that they may have simply been intercepted by MC's forces, and acting as a severe data breach for Architect. Unclear...
The likelihood that Imprinter = A9 is very low, so I would not consider this as a plausible hypothesis. Instead, Imprinter seems like an outside force, and a separately-originated faction entirely.
Zion dialogue 71 seems not-unreasonable. The Imprinter may require standard robotic cores to make use of z-tech, as Assembled cores can't be rewired/reprogrammed, and GUs are autonomous and like-wise can't be rewired/hacked. Instead, she likely requires standard cores to synthesize with z-tech parts to make functional z-units.