Wow, I thought this was gonna be "Chille Tid" or "Kiki's Pizza Delivery" all over again, but turns out it wasn't. I liked how this added more to what happened to Pink Diamond.
Oh, and we get to see more of Blue Diamond, and another Warship (though this one has an arm). If my theory on them being connected to some sort of giant mecha is true, maybe there is more than one mecha, or its parts are all different colors.
Blue Diamond seems a lot less harsh than the others, don't you think?
Also, this gives a solid explanation of why the Ruby Squad was after Jasper, not Peridot. They didn't know that the Cluster was deactivated, and they were gonna save Jasper from the planet's destruction, while let the traitorous Peridot stay there and die. And they apparently still don't, because Blue Diamond kidnapped Greg for a similar reason.