Section IV - International Conflict and Peace Study(general commentary + FULL solutions for Cold War)
This is the section where I am the most unfamiliar with some of the other topics, so unfortunately I can really only comment specifically on the Cold War questions. I have heard that the Indochina questions however were okay - that the first one would have been quite hard, but that the second was accessible

For Cold War, I think they were pretty good! However I think a lot of people would have been apprehensive about the first question, just because of it's explicit reference to ideology, and would have been worried that they'd have to incorporate difficult ideological theory within their essays. You definitely COULD have done that, but it wasn't essential
My judgement for the first question would be:
Ideology was highly critical to the development of the Cold War, as ideological tensions underpinned all action and activity by the US and the USSR during the period.I would have structured my essay one of two ways:
Paragraph 1: Impact of Ideology on Containment
Paragraph 2: Impact of Ideology on the Arms Race
Paragraph 3: Impact of Ideology on the Crises (Berlin, Cuba, Cz)
OR I would have structured it according to the crises, and how ideology impacted them

Paragraph 1: Berlin Wall
Paragraph 2: Cuban Missile Crisis
Paragraph 3: The Invasion of Czechoslovakia
The second question was reasonably simple

Yes, it may seem specific at first, but you can talk about all the factors after the Soviet Invasion of Afghanistan, as you can link its impact pretty easily to all the other factors. Thus this would have been my judgement:
"The Soviet Invasion of Afghanistan was highly critical to the end of the Cold War, as it influenced both US and USSR diplomacy, contributing to a power imbalance towards the US".
I'd then just structure it according to the syllabus dot points.
Paragraph 1: Soviet Invasion of Afghanistan
Paragraph 2: How the soviet invasion of Afghanistan impacted the US attitudes and policies under Reagan
Paragraph 3: How the soviet invasion of Afghanistan impacted the USSR attitudes and policies under Gorbachev (incorporating collapse of communism within this one, through linking it to Glasnost)
Paragraph 4: How this all culminated in the Disarmament agreements
But yeah, for Cold War, overall pretty decent questions!