Right - will need a rewatch as the kids were chirruping a bit but in general I quite liked that one. Gatiss does some great one-liners and there is a real gothic camp to his writing "the planet with be red with the blood of humaniteeeeee" or something like that 
Loved the development about the ice warrior coming out of his shell, and why he would do that. The suit responding to him so he could get back in, was great - but I could see some people wouldn't like it. The head and tail solution to show an ice warrior out of his armour was well done, I thought - the suggestion can be more frightening than the reality when it comes to monsters and showing just hints retains some of the mystique.
Ending was a bit of a damp squib, but I do wonder if it was just part 1 of 2 - maybe next year or the year after. Maybe the ice warrior wasn't showing compassion and forgiveness so much as postponing the action to a later date!
The 80's vibe was right - guffawed at Ultravox and Duran Duran. But also the knowledge that the cold war had to remain a phoney war, with posturing and manoeuvres but everyone knowing that as soon as any button was pressed it would be game over. Can't recall when they dated the ep but thought that if it had been a bit later, they could have had a bit of Frankie Goes to Hollywood "Two Tribes"!
It also hit me that this is SOOO prescient right now, with all the cold-war-esque posturing of North Korea at the minute being taken too close to reality.
Last week, Rings left me a bit meh - this week was more enjoyable.
Slight quibble - the Tardis had vacated the sub and was in the South Pole - so does the translation matrix really cover that distance? In terms of Clara, do we now know that the Tardis will translate for her? If so, what happened last week? It struck me that perhaps it did not translate for her when the Doctor wasn't around - so does that mean the Tardis just doesn't realise she's there, and Clara is just being caught up in the translation matrix for the Doctor when they are together? Or was the barking non-translation just a bit of liberty with the plot last week for the sake of a laugh?