Agreed. This was how it was for The National from friends who didn't know them before hand. Awesome might be a stretch, but they enjoyed it, whereas I (and people on here) weren't that impressed by it, given that we know what they're capable of.
I imagine it will be the same here. A 1hr set in the daylight with fans saying "it was fine, could have been better", and people that don't know them thinking it was pretty good and maybe checking them out further.
LCD/their agent probably specifically wanted to play the Pyramid too, to reach a wider audience. Placements are agreed in advance, especially with acts this size, so it's not as if they've realised they're subbing the PYramid, and not headlining Other again/Woddsies, and thought "oh sh*t, what a disaster placement"......