Ok, so I watched the show last night - and now that I'm at a computer rather than working off my phone - I can give a little more here.
I have been talking about the show with my wife and she watched it with me. She loves football (soccer here obviously) and still plays damn well, but isn't a big fan of any team, so she just finds my interest amusing. But she loves a good story - not that there was much good in the Hillsborough story for 20+ years - but as a story, it's definitely up there.
The show had lots of comments from police officers and family members and some people that were there. These were all quite telling and very engaging. They had a lot of footage from the day - the buildup, the stadium inside and out, and the match and followup. Now I've read a decent amount about the events that day and what happened after but had never seen some of this. The show did a lot with the stadium, how it was laid out, where the people came from, where they went. They exposed the lies that were told. I had forgotten that Superintendant Mole (a man with experience) had been replaced due to a scandal (in which he was not involved) less than a month and that was how Duckenfield was in charge. There was a lot shown of the actual events of the day and how horrible it must have been.
They talked of the families and how they were told about the events. They told of the lies that were quickly started and used to blame the supporters. My wife on all this kept saying "how did people believe these lies". They told of how the families went to the Boys Club to identify the dead. They told of the Taylor Report, and then the ridiculous classification of accidental death by Coroner Popper. Then they told about the trials and was in disbelief that people "got away with what they did" (or didn't do).
She then asked me, "So what happened... how did they keep fighting?" and I told her... "They just couldn't quit until they got answers and justice, and If something like this happened to you, I would do the same". My wife had such an impression of Margaret Aspinall and the others (but remembered her most) and her resolve. She also was amazed at the footage of Andy Burnham at the 20th anniversay when "Justice" was called out and how that grew and grew - and commented how his body language and face completely changed during those seconds... and loved that he then took that on as a mission.
Anyway, that was my impression - largely based on what my wife learned during the show.
By the way, they also had information about the win against Manchester City... so they did do a little bit of update to show the current situation of the team as well but it was how it related to Hillsborough and the resolve and the fight and how things are on the up for the families and the team.