At least some of this material for the new season is pulled from side content as opposed to the main series novels - episode 2, for example, I gather is based on an audio drama as opposed to one of the main novels. That probably explains at least some of the lack of forward momentum this last couple of weeks, but I'd imagine they'll have to get back to the main plot shortly.
OK, that makes a lot of sense. Cheers!
Maybe they are trying to establish more backstory to hit us with more fun stuff in the future.
Kirino goes full on Lesbo in one of the girls