There were some really good bits in that episode and some quite shit stuff.
Good stuff - Flaming swords and just priest woman flaming shit up in general, genuinely tense zombie mgs sequence with Arya that made me jump when they burst through the wrong door
Shit stuff - bottle job with killing more of the major characters to the extent that they were literally the only ones left at the end, Arya delivering an rko out of nowhere.
Oh and glad that others are saying it was too dark. I thought my TV was fecked. Was barely watchable at times.