Yep. Her zen-like nature has actually caused problems, too, like when she was REALLY into Meat Beat Mania (which, being a recovering Beatmania addict, I can relate with all too well).
Everything about the Cluster is horrific and creepy and gives a new motivation to the Crystal Gems.
I don't think this freakshow was the "cluster" that's been mentioned before, if only because Peridot doesn't actually talk about that in this episode when she's logging about the fusion experiments.