Well, I think that the two concepts stem from a similar root.
In fact, John A. Wheeler pointed out that we may live in a "participatory universe" and that physics-observer-information are entangled in a strange loop (John Wheeler, Information, Physics, Quantum. The Search for Links).
The passage following the one you quoted states the same thing with almost the same words:
"... reality helps shape the participants' thinking and the participants' thinking helps shape reality in an unending process in which thinking and reality may come to approach each other but can never become identical..."
It seems to me that "reflexivity" can be described generally as a property of self-determining epistemic systems -- which is an epiontic feature indeed.
This is good news... maybe epiontic models could have applications beyond (meta)physics and deserve attention in any case.
Thanks for the interesting link!
L. Acerbi