This might be a reach, but...
I was thinking about this moment:
And am I the only one to find it interesting that Saraqael here is reminding Crowley about his past as an angel (and nebulas, that were his passion back then) just a couple of hours before the offer is made to take Crowley back to that past? And Saraqael does react to his answer?
Now, I'm not in a team "trust Saraqael" - I am in a team "don't ever trust the security officer of an opressive system however friendly they might appear to be, unless you know their full motivation". We don't know any of Saraqael's motives - yet we can see, for example, that them letting Crowley looking into Gabriel's files actually led to Heaven finding out what happened to the former Supreme Archangel.
We also can see just a minute from this moment that Heaven as a place does have video surveillance:
So...what if Saraqael is directly subordinate to The Metatron and here they do follow his orders? What if these words ("remember how you was an angel and how much you enjoyed making nebulas?") was spoken with a purpose to see Crowley's reaction to it? Will there be some kind of regret, or shame, or anger - or just indifference?
What if his reaction was recorded in a real time and was quickly analysed by The Metatron himself, so he could imagine how Crowley feels about his angelhood in the present, and act accordingly?