^Isn‘t this supposed to be spoiler-free?
At any rate, I’d give it 4 stars. Definitely not bad, in my opinion, it was entertaining and the animation was very nice again. And I personally quite liked the more quiet, action-absent parts. But it isn’t perfect either. Simply the fact that it’s a filler episode doesn’t make it bad (given the previous events, it makes sense that this episode would be more focused on a smaller scale) but certain plot events could have been handled better