Man, that dusting Igvarge in cold blood... gives a new perspective not seen previously from Ainz. There's been a bit of introspection and talk from Ainz about his willingness to do certain things, but he's never actually gone to the lengths of doing them, so it was hard to take him seriously or simply concluding that he's over-thinking things.
So in that regard, the incongruence I had with the previous episode has been completely diminished, though fact still remains that Shalltear lost control and went against some of Ainz wishes.
Anyways, one episode left... I'm expecting to be left completely unsatisfied and wishing for another season that has slim chances of happening.