Ohhohoh. Keeping with the tradition of having a dope-ass third episode, I see.
Cons:
I can't think of anything to complain about. I guess I wonder if Cerkonos's fate will be explicitly shown to us later, if the ambiguity intentional, or if I'm supposed to understand he's dead? They squished his eyes in pretty good there (ewww) but didn't do a full head explode-y situation like that one scene in Game of Thrones so... unclear.
The episode hangs a lampshade on the fact that the Matron's warning to Vax is very vague. In fact it hangs two lampshades. This does not make it less irritating though. I think maybe this would have been a little better if the Matron had been more explicit about the warning, but had been uncertain herself as to the timing. Kind of a "dark times are coming, there are people fucking with death itself, power is coalescing and as my Champion it's important you be ready." Something. This is a nitpick, it's still always soooo cool to see the Matron, her design in the show is sick as hell.