Yes! Lacklustre is the word! It was great to see/hear the nods to other episodes but it just seemed so pointless. What a big build up to absolutely nothing.
I loved it. I don't think a 'normal' episode would've worked at all. I was loving every second, I want to go back and watch every episode from the beginning again now.
When the advert came up at the end to advertise series 1-9 on iPlayer I was convinced something would pop up in there as a massive twist, like a new series or something, but nope. Just an advert.